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词汇 convex
释义

Definition of convex in English:

convex

adjective ˈkɒnvɛks
  • 1Having an outline or surface curved like the exterior of a circle or sphere.

    (轮廓或表面)凸的,凸圆的。比较CONCAVE

    a convex lens
    Compare with concave
    Example sentencesExamples
    • Galileo's telescope had a convex object lens but a concave eye-piece.
    • Surprised, Jeana turned to look at her reflection in the mirror with the convex surface.
    • This particular beach is many miles long and shaped like a new moon, a convex curve extending into the Gulf of Mexico.
    • Ridges on the convex surface are not as well developed as those on the flat surface.
    • The steroid treatment consisted of three implants per ear inserted subcutaneously on the convex surface of the ear.
    • The exterior walls were composed of concave and convex red bricks.
    • It weighs 440 g. One surface is smoothly convex and may have been used as a grinding stone.
    • Carve out squares of curving surfaces, concave and convex.
    • Go for a nice belly in the blade - a nice convex curve seriously improves cutting.
    • Light enters the human eye via the transparent cornea, the eye's front window, which acts as a powerful convex lens.
    • For the ceiling, he ‘proposed a series of convex surfaces,’ lowered toward the front.
    • With water the surface is concave, with mercury it is convex.
    • Through the convex lens these frozen moments in time are of the other ‘side’.
    • Sometimes, highlighted down the middle where the trees grew tall, the surface could look convex.
    • The tongue normally offers a convex surface to the roof of the mouth: for an r-sound, the tongue surface is often hollowed out and the tip raised.
    • The water column was lowered over the dry grains until the convex surface just touched them.
    • From the level of tooth one to tooth five, the lateral surface is slightly convex.
    • He likened this to asking an artisan to explain how the convex surface of a peg can possibly fill that of a concave hole.
    • While the pillows are still partially molten they are compacted together so that they display convex upper surfaces and downwards-facing cusps at their contacts.
    • Powerful images captured through a convex lens are frozen in time.
    Synonyms
    curved outwards, cambered
    rounded, bulging, swelling, protuberant
    curvilinear
    gibbous
    rare outcurved
  • 2(of a polygon) not having any interior angles greater than 180°.

    (多边形)无一内角超过180°的;凸多边形的

    Example sentencesExamples
    • A convex polygon with a triangle attached to one of its edges in this way is called a barbed polygon.
    • However, despite such examples, it is commonly believed that if you restrict yourself to looking at convex polygons, this question has a positive answer.
    • We used convex polygons to estimate distances between colony centers and the size of each colony to define the area of burrows in use by a family group in a current season.
    • The 95% minimum convex polygon was estimated for each bird using all sightings.
    • Calculating the convex polygon for the immature male resulted in an inaccurate representation of his movement patterns.

Derivatives

  • convexity

  • noun kɒnˈvɛksɪti
    • The stronger the convexity of the basic curve of the rotating body of the element, the higher the critical interlocking force.
      Example sentencesExamples
      • Narrow, smooth longitudinal ridges are visible on both sides of a wide, more or less elevated central convexity with a rather irregular surface.
      • In addition to curve degree, physicians should describe curves as ‘right’ or ‘left,’ based on their curve convexity.
      • In the present model, on the contrary, the rotating angle of the generating curve is standardized by the rate of enlargement of the curve, so as to define the convexity of the shell.
      • Some of the variation evident on the extant pins, such as the degree of concavity / convexity of head tops and the presence, size, and definition of shoulder elements, may lend itself to analysis given an appropriate size sample.
  • convexly

  • adverb
    • The inner edge of the doublure appears to be entire, curved convexly outward.
      Example sentencesExamples
      • The smooth external surface of the axial rings of the anterior seven segments in the thorax of S. pronus suggests that the thorax could be flexed strongly both concavely and convexly.
      • A cube at first glance shows the inside, and at second glance, the outside, protruding convexly into space.

Origin

Late 16th century: from Latin convexus 'vaulted, arched'.

  • cave from Middle English:

    Latin cavus, ‘hollow’, is the origin of a number of English words, including cave, cavern (Late Middle English), cavity (mid 16th century), and excavate (late 16th century). Concave (Late Middle English) is from cavus preceded by con ‘with’, while convex (late 16th century) is from the Latin for ‘vaulted, arched’. In the days when more people knew Latin, there was a second English word spelled cave. This one, pronounced kah-vay, meant ‘beware!’, and was used from the mid 19th century by schoolchildren to warn their friends that a teacher was coming.

Rhymes

annex, ex, flex, hex, perplex, Rex, specs, Tex, Tex-Mex, vex

Definition of convex in US English:

convex

adjective
  • 1Having an outline or surface curved like the exterior of a circle or sphere.

    (轮廓或表面)凸的,凸圆的。比较CONCAVE

    a convex lens
    Compare with concave
    Example sentencesExamples
    • For the ceiling, he ‘proposed a series of convex surfaces,’ lowered toward the front.
    • With water the surface is concave, with mercury it is convex.
    • The water column was lowered over the dry grains until the convex surface just touched them.
    • This particular beach is many miles long and shaped like a new moon, a convex curve extending into the Gulf of Mexico.
    • Galileo's telescope had a convex object lens but a concave eye-piece.
    • Powerful images captured through a convex lens are frozen in time.
    • While the pillows are still partially molten they are compacted together so that they display convex upper surfaces and downwards-facing cusps at their contacts.
    • Go for a nice belly in the blade - a nice convex curve seriously improves cutting.
    • Ridges on the convex surface are not as well developed as those on the flat surface.
    • Sometimes, highlighted down the middle where the trees grew tall, the surface could look convex.
    • Surprised, Jeana turned to look at her reflection in the mirror with the convex surface.
    • Through the convex lens these frozen moments in time are of the other ‘side’.
    • From the level of tooth one to tooth five, the lateral surface is slightly convex.
    • Carve out squares of curving surfaces, concave and convex.
    • Light enters the human eye via the transparent cornea, the eye's front window, which acts as a powerful convex lens.
    • The tongue normally offers a convex surface to the roof of the mouth: for an r-sound, the tongue surface is often hollowed out and the tip raised.
    • It weighs 440 g. One surface is smoothly convex and may have been used as a grinding stone.
    • The steroid treatment consisted of three implants per ear inserted subcutaneously on the convex surface of the ear.
    • The exterior walls were composed of concave and convex red bricks.
    • He likened this to asking an artisan to explain how the convex surface of a peg can possibly fill that of a concave hole.
    Synonyms
    curved outwards, cambered
  • 2(of a polygon) having only interior angles measuring less than 180°.

    (多边形)无一内角超过180°的;凸多边形的

    Example sentencesExamples
    • However, despite such examples, it is commonly believed that if you restrict yourself to looking at convex polygons, this question has a positive answer.
    • We used convex polygons to estimate distances between colony centers and the size of each colony to define the area of burrows in use by a family group in a current season.
    • Calculating the convex polygon for the immature male resulted in an inaccurate representation of his movement patterns.
    • A convex polygon with a triangle attached to one of its edges in this way is called a barbed polygon.
    • The 95% minimum convex polygon was estimated for each bird using all sightings.

Origin

Late 16th century: from Latin convexus ‘vaulted, arched’.

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