Definition of penumbra in English:

penumbra

nounPlural penumbrae, Plural penumbras pɪˈnʌmbrəpəˈnəmbrə

1The partially shaded outer region of the shadow cast by an opaque object.
（不透明物体投射的）阴影的外围半阴暗部分
Example sentencesExamples
- Shadows and penumbras were instantaneously formed from the myriad of trees and hills that he surveyed through the window, and just as quickly vanished.
- He is pacing up and down the library in the gloom, ‘the penumbra of the library’, as he put it, and he thinks of a tiger in the jungle, and this is ‘The Other Tiger’.
- He brings a sharp eye to the bedside of a poet friend and to urban decay, ‘the dust of voices, / the smoky penumbra around streetlights.’
- Our planet's shadow has two parts, a dark inner core called the umbra and a pale outer fringe called the penumbra.
- He stands within the penumbra of the falls, near the top of Irish Mountain.
- The black penumbra which appears when you first look to its edges soon becomes brown.
- The penumbra of his face, and the emanations of light leaking from behind his ears, and his hair, was blinding.
- Neon glow qualifies the relation of work to wall; each piece generates its own set of shadow and penumbra.
- And we would do well to remember that the penumbra is the lighter, outer region of the shadow, the halo, indeed, of the shadow.
- In other cases the Moon does not pass through the umbra at all, just going through the penumbra (a region of partial shadow).
- A penumbra of fiery purple encircles this near-seamless construction of photographs, objects and painted images on wood.
- The Moon begins to enter the Earth's outer shadow, or penumbra, at 9: 06 P.M.
- Long, thin filaments radiate from the umbra into a brighter surrounding region called the penumbra.
1. 1.1Astronomy The shadow cast by the earth or moon over an area experiencing a partial eclipse.
  〔天文〕（日食、月食的）半影
  Example sentencesExamples
  A penumbral eclipse, sometimes called an appulse, occurs when the Moon misses the Earth's umbra but passes through its penumbra or secondary shadow.
  The Moon on April 24th will glide through Earth's penumbra, producing what astronomers call a ‘penumbral lunar eclipse.’
  So, one will observe either a total eclipse by the umbra (which can be well observed), a partial eclipse by the umbra and penumbra, or a total or partial eclipse by the penumbra only.
  On Friday morning, the moon will enter the penumbra of the Earth's shadow at 3: 05 am, and the moonlight will become dimmer.
  As the partial phase progresses, you are moving deeper and deeper into the Moon's penumbra.
  Synonyms
  silhouette, outline, shape, contour, profile
2. 1.2Astronomy The less dark outer part of a sunspot, surrounding the core.
  〔天文〕半影（太阳黑子周围较淡的部分）
  Example sentencesExamples
  Theorists suspect that the penumbra is key to keeping a sunspot intact.
2A peripheral or indeterminate area or group.
an immense penumbra of theory surrounds any observation
Example sentencesExamples
- My guess is that eliminating the double taxation of dividends would lead to a powerful rally in stock prices and would do much to lift the penumbra of uncertainty that has bedeviled both consumers and corporate managers.
- He had a sound belief in astrology, the stars being the twinkling penumbra of his incandescent belief in the ‘free market,’ with whose motions it was blasphemous to tamper.
- Others tell different jokes that are incoherent except in the penumbra cast by the joke.
- Like many words in everyday use, it carries with it, as it were, a penumbra of different shades of meaning.
- If the court could remove the legal impediments to education provided by the state, why couldn't it also read, in penumbras and emanations, any number of other rights and privileges that they thought it would be nice for people to have?

Derivatives

penumbral

adjective pɪˈnʌmbrəlpəˈnəmbrəl

The nearly flat trail was bordered on one side by precipitous slopes, where penumbral snowfields fell into the crater 100 feet below.
Example sentencesExamples
- It would obviously be impossible to view the exhibits in the penumbral candlelight by which they would originally have been seen.
- I think it's important that we recognize the existence of this problematic, penumbral group, but that doesn't mean that there aren't people who do take responsibility.
- Rick would howl, and then rapidly half-wade, half-swim down the penumbral corridor and stumble up onto the next sandbank, laughing.
- I've just discovered that there's also going to be a penumbral eclipse of the moon, too - which may be undetectable to the human eye, but worth looking out for just in case.

Origin

Mid 17th century: modern Latin, from Latin paene 'almost' + umbra 'shadow'.

Rhymes

umbra

Definition of penumbra in US English:

penumbra

nounpəˈnəmbrəpəˈnəmbrə

1The partially shaded outer region of the shadow cast by an opaque object.
（不透明物体投射的）阴影的外围半阴暗部分
Example sentencesExamples
- He is pacing up and down the library in the gloom, ‘the penumbra of the library’, as he put it, and he thinks of a tiger in the jungle, and this is ‘The Other Tiger’.
- Our planet's shadow has two parts, a dark inner core called the umbra and a pale outer fringe called the penumbra.
- The penumbra of his face, and the emanations of light leaking from behind his ears, and his hair, was blinding.
- The black penumbra which appears when you first look to its edges soon becomes brown.
- The Moon begins to enter the Earth's outer shadow, or penumbra, at 9: 06 P.M.
- And we would do well to remember that the penumbra is the lighter, outer region of the shadow, the halo, indeed, of the shadow.
- He brings a sharp eye to the bedside of a poet friend and to urban decay, ‘the dust of voices, / the smoky penumbra around streetlights.’
- Long, thin filaments radiate from the umbra into a brighter surrounding region called the penumbra.
- In other cases the Moon does not pass through the umbra at all, just going through the penumbra (a region of partial shadow).
- He stands within the penumbra of the falls, near the top of Irish Mountain.
- A penumbra of fiery purple encircles this near-seamless construction of photographs, objects and painted images on wood.
- Shadows and penumbras were instantaneously formed from the myriad of trees and hills that he surveyed through the window, and just as quickly vanished.
- Neon glow qualifies the relation of work to wall; each piece generates its own set of shadow and penumbra.
1. 1.1Astronomy The shadow cast by the earth or moon over an area experiencing a partial eclipse.
  〔天文〕（日食、月食的）半影
  Example sentencesExamples
  So, one will observe either a total eclipse by the umbra (which can be well observed), a partial eclipse by the umbra and penumbra, or a total or partial eclipse by the penumbra only.
  The Moon on April 24th will glide through Earth's penumbra, producing what astronomers call a ‘penumbral lunar eclipse.’
  As the partial phase progresses, you are moving deeper and deeper into the Moon's penumbra.
  On Friday morning, the moon will enter the penumbra of the Earth's shadow at 3: 05 am, and the moonlight will become dimmer.
  A penumbral eclipse, sometimes called an appulse, occurs when the Moon misses the Earth's umbra but passes through its penumbra or secondary shadow.
  Synonyms
  silhouette, outline, shape, contour, profile
2. 1.2Astronomy The less dark outer part of a sunspot, surrounding the dark core.
  〔天文〕半影（太阳黑子周围较淡的部分）
  Example sentencesExamples
  Theorists suspect that the penumbra is key to keeping a sunspot intact.

Origin

Mid 17th century: modern Latin, from Latin paene ‘almost’ + umbra ‘shadow’.

词汇	penumbra
释义	Definition of penumbra in English: penumbra nounPlural penumbrae, Plural penumbras pɪˈnʌmbrəpəˈnəmbrə 1The partially shaded outer region of the shadow cast by an opaque object. （不透明物体投射的）阴影的外围半阴暗部分 Example sentencesExamples Shadows and penumbras were instantaneously formed from the myriad of trees and hills that he surveyed through the window, and just as quickly vanished. He is pacing up and down the library in the gloom, ‘the penumbra of the library’, as he put it, and he thinks of a tiger in the jungle, and this is ‘The Other Tiger’. He brings a sharp eye to the bedside of a poet friend and to urban decay, ‘the dust of voices, / the smoky penumbra around streetlights.’ Our planet's shadow has two parts, a dark inner core called the umbra and a pale outer fringe called the penumbra. He stands within the penumbra of the falls, near the top of Irish Mountain. The black penumbra which appears when you first look to its edges soon becomes brown. The penumbra of his face, and the emanations of light leaking from behind his ears, and his hair, was blinding. Neon glow qualifies the relation of work to wall; each piece generates its own set of shadow and penumbra. And we would do well to remember that the penumbra is the lighter, outer region of the shadow, the halo, indeed, of the shadow. In other cases the Moon does not pass through the umbra at all, just going through the penumbra (a region of partial shadow). A penumbra of fiery purple encircles this near-seamless construction of photographs, objects and painted images on wood. The Moon begins to enter the Earth's outer shadow, or penumbra, at 9: 06 P.M. Long, thin filaments radiate from the umbra into a brighter surrounding region called the penumbra. 1.1Astronomy The shadow cast by the earth or moon over an area experiencing a partial eclipse. 〔天文〕（日食、月食的）半影 Example sentencesExamples A penumbral eclipse, sometimes called an appulse, occurs when the Moon misses the Earth's umbra but passes through its penumbra or secondary shadow. The Moon on April 24th will glide through Earth's penumbra, producing what astronomers call a ‘penumbral lunar eclipse.’ So, one will observe either a total eclipse by the umbra (which can be well observed), a partial eclipse by the umbra and penumbra, or a total or partial eclipse by the penumbra only. On Friday morning, the moon will enter the penumbra of the Earth's shadow at 3: 05 am, and the moonlight will become dimmer. As the partial phase progresses, you are moving deeper and deeper into the Moon's penumbra. Synonyms silhouette, outline, shape, contour, profile 1.2Astronomy The less dark outer part of a sunspot, surrounding the core. 〔天文〕半影（太阳黑子周围较淡的部分） Example sentencesExamples Theorists suspect that the penumbra is key to keeping a sunspot intact. 2A peripheral or indeterminate area or group. an immense penumbra of theory surrounds any observation Example sentencesExamples My guess is that eliminating the double taxation of dividends would lead to a powerful rally in stock prices and would do much to lift the penumbra of uncertainty that has bedeviled both consumers and corporate managers. He had a sound belief in astrology, the stars being the twinkling penumbra of his incandescent belief in the ‘free market,’ with whose motions it was blasphemous to tamper. Others tell different jokes that are incoherent except in the penumbra cast by the joke. Like many words in everyday use, it carries with it, as it were, a penumbra of different shades of meaning. If the court could remove the legal impediments to education provided by the state, why couldn't it also read, in penumbras and emanations, any number of other rights and privileges that they thought it would be nice for people to have? Derivatives penumbral adjective pɪˈnʌmbrəlpəˈnəmbrəl The nearly flat trail was bordered on one side by precipitous slopes, where penumbral snowfields fell into the crater 100 feet below. Example sentencesExamples It would obviously be impossible to view the exhibits in the penumbral candlelight by which they would originally have been seen. I think it's important that we recognize the existence of this problematic, penumbral group, but that doesn't mean that there aren't people who do take responsibility. Rick would howl, and then rapidly half-wade, half-swim down the penumbral corridor and stumble up onto the next sandbank, laughing. I've just discovered that there's also going to be a penumbral eclipse of the moon, too - which may be undetectable to the human eye, but worth looking out for just in case. Origin Mid 17th century: modern Latin, from Latin paene 'almost' + umbra 'shadow'. Rhymes umbra Definition of penumbra in US English: penumbra nounpəˈnəmbrəpəˈnəmbrə 1The partially shaded outer region of the shadow cast by an opaque object. （不透明物体投射的）阴影的外围半阴暗部分 Example sentencesExamples He is pacing up and down the library in the gloom, ‘the penumbra of the library’, as he put it, and he thinks of a tiger in the jungle, and this is ‘The Other Tiger’. Our planet's shadow has two parts, a dark inner core called the umbra and a pale outer fringe called the penumbra. The penumbra of his face, and the emanations of light leaking from behind his ears, and his hair, was blinding. The black penumbra which appears when you first look to its edges soon becomes brown. The Moon begins to enter the Earth's outer shadow, or penumbra, at 9: 06 P.M. And we would do well to remember that the penumbra is the lighter, outer region of the shadow, the halo, indeed, of the shadow. He brings a sharp eye to the bedside of a poet friend and to urban decay, ‘the dust of voices, / the smoky penumbra around streetlights.’ Long, thin filaments radiate from the umbra into a brighter surrounding region called the penumbra. In other cases the Moon does not pass through the umbra at all, just going through the penumbra (a region of partial shadow). He stands within the penumbra of the falls, near the top of Irish Mountain. A penumbra of fiery purple encircles this near-seamless construction of photographs, objects and painted images on wood. Shadows and penumbras were instantaneously formed from the myriad of trees and hills that he surveyed through the window, and just as quickly vanished. Neon glow qualifies the relation of work to wall; each piece generates its own set of shadow and penumbra. 1.1Astronomy The shadow cast by the earth or moon over an area experiencing a partial eclipse. 〔天文〕（日食、月食的）半影 Example sentencesExamples So, one will observe either a total eclipse by the umbra (which can be well observed), a partial eclipse by the umbra and penumbra, or a total or partial eclipse by the penumbra only. The Moon on April 24th will glide through Earth's penumbra, producing what astronomers call a ‘penumbral lunar eclipse.’ As the partial phase progresses, you are moving deeper and deeper into the Moon's penumbra. On Friday morning, the moon will enter the penumbra of the Earth's shadow at 3: 05 am, and the moonlight will become dimmer. A penumbral eclipse, sometimes called an appulse, occurs when the Moon misses the Earth's umbra but passes through its penumbra or secondary shadow. Synonyms silhouette, outline, shape, contour, profile 1.2Astronomy The less dark outer part of a sunspot, surrounding the dark core. 〔天文〕半影（太阳黑子周围较淡的部分） Example sentencesExamples Theorists suspect that the penumbra is key to keeping a sunspot intact. Origin Mid 17th century: modern Latin, from Latin paene ‘almost’ + umbra ‘shadow’.
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