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单词 allantoin
释义

WordReference Random House Unabridged Dictionary of American English © 2024
al•lan•to•in  (ə lan′tō in),USA pronunciation n. [Biochem., Pharm.]
  1. Biochemistry, Drugsa white powder, C4H6N4O3, produced by oxidation of uric acid and the major excretory product of purine degradation in many vertebrates: used medicinally to heal skin ulcers and in lotions, lipsticks, etc., for its soothing effect.
  • 1835–45; allanto(is) + -in2; so named because it is found in the fluid of the allantois

Collins Concise English Dictionary © HarperCollins Publishers::
allantoin /ˌælənˈtəʊɪn/ n
  1. a substance derived from the secretions of snails and contained in some plants, used in skin care products and valued for its soothing properties
Etymology: 19th Century: from allantois
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更新时间：2025/7/31 4:51:48