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词汇 tannin
释义

Definition of tannin in English:

tannin

noun ˈtanɪnˈtænən
mass noun
  • A yellowish or brownish bitter-tasting organic substance present in some galls, barks, and other plant tissues, consisting of derivatives of gallic acid.

    丹宁酸,鞣酸

    Example sentencesExamples
    • The immature grain of these hybrids is high in tannin and quite bitter.
    • The caffeine and tannins in tea, coffee and colas are also dehydrating agents, so don't drink more than a two cups a day.
    • Our perception of sweetness can be affected by a number of other factors, such as temperature, tannin and carbon dioxide, not to mention alcohol.
    • This was destined to become part of the thick liquor in the tanning pits for leather, as Oak trees in particular have high levels of tannin in the bark.
    • It must be eaten ripe, since latex and tannin present in the unripe fruit give it an unpleasantly astringent taste.
    • In contrast, caffeine binds with phenols and tannins, thus neutralizing these effects.
    • The two streams are known as blackwater creeks because tannin, released from the breakdown of leaves in the woods, darkens their waters.
    • Honeysuckle imparts a raw sweetness with hints of tannin.
    • Another common problem with cedar, redwood and certain other species is a natural resin in the wood called tannin.
    • Rooibos tea contains no caffeine and is very low in tannin.
    • The result is a fruity wine, high in aromatics and low in tannin.
    • The association of tannin with caffeine allows the caffeine to be released slowly into the blood.
    • The tannin extracted from the bark and wood was important in the leather industry.
    • In juvenile plants, the relative amount of tannin increased in March, decreased in April and July, and increased again in October.
    • Chipped chestnut wood and bark also were used as a source of tannin for the leather industry.
    • To counteract intestinal discharges probably caused by the calomel, surgeons administered tannin, sulphuric acid, or morphia.
    • Additionally, the content of another product of the phenyl propanoid pathway, tannin, was examined in buckwheat plants.
    • If you take any grape - black, red or green - and slice it through the middle it looks much the same: the stalk is woody and full of a substance called tannin.
    • If leeching tannin is the problem, a good sealer is the answer.
    • This was because tannin, a chemical that gives tea and coffee a bitter taste, binds to certain ceramic and metal materials.

Origin

Early 19th century: from French tanin, from tan 'tanbark' (ultimately related to tan1) + -in1.

  • tan from Old English:

    The original sense of tan is to convert skins into leather. The sense of the colour that the skin acquires after exposure to the sun dates only to the middle of the 18th century. Tan probably comes directly from Latin tannare, but may ultimately go back to a Celtic word for an oak tree. This reflects the process of tanning, whereby the crushed bark of an oak was steeped in water in which skins and hides were then immersed. Oak bark was used because it is rich in tannins (early 19th century), compounds which will tan. The related word tawny (Middle English) comes from Old French tauné, ‘tanned’.

Definition of tannin in US English:

tannin

nounˈtanənˈtænən
  • A yellowish or brownish bitter-tasting organic substance present in some galls, barks, and other plant tissues, consisting of derivatives of gallic acid, used in leather production and ink manufacture.

    丹宁酸,鞣酸

    Example sentencesExamples
    • The association of tannin with caffeine allows the caffeine to be released slowly into the blood.
    • The result is a fruity wine, high in aromatics and low in tannin.
    • If you take any grape - black, red or green - and slice it through the middle it looks much the same: the stalk is woody and full of a substance called tannin.
    • Additionally, the content of another product of the phenyl propanoid pathway, tannin, was examined in buckwheat plants.
    • Another common problem with cedar, redwood and certain other species is a natural resin in the wood called tannin.
    • Our perception of sweetness can be affected by a number of other factors, such as temperature, tannin and carbon dioxide, not to mention alcohol.
    • The immature grain of these hybrids is high in tannin and quite bitter.
    • The caffeine and tannins in tea, coffee and colas are also dehydrating agents, so don't drink more than a two cups a day.
    • To counteract intestinal discharges probably caused by the calomel, surgeons administered tannin, sulphuric acid, or morphia.
    • The tannin extracted from the bark and wood was important in the leather industry.
    • In juvenile plants, the relative amount of tannin increased in March, decreased in April and July, and increased again in October.
    • Honeysuckle imparts a raw sweetness with hints of tannin.
    • This was destined to become part of the thick liquor in the tanning pits for leather, as Oak trees in particular have high levels of tannin in the bark.
    • It must be eaten ripe, since latex and tannin present in the unripe fruit give it an unpleasantly astringent taste.
    • Rooibos tea contains no caffeine and is very low in tannin.
    • Chipped chestnut wood and bark also were used as a source of tannin for the leather industry.
    • The two streams are known as blackwater creeks because tannin, released from the breakdown of leaves in the woods, darkens their waters.
    • This was because tannin, a chemical that gives tea and coffee a bitter taste, binds to certain ceramic and metal materials.
    • In contrast, caffeine binds with phenols and tannins, thus neutralizing these effects.
    • If leeching tannin is the problem, a good sealer is the answer.

Origin

Early 19th century: from French tanin, from tan ‘tanbark’ (ultimately related to tan) + -in.

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