英语词汇“allantois”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

al•lan•to•is n. [Embryol., Zool.]

Developmental Biology, Zoologya vascular, extraembryonic membrane of birds, reptiles, and certain mammals that develops as a sac or diverticulum from the ventral wall of the hindgut.

Greek allantoeidé̄s, wrongly taken for plural and given a singular, on the model of words like hērōís (singular), hērōídes (plural)
Neo-Latin
1640–50

Collins Concise English Dictionary © HarperCollins Publishers::

allantois /ˌælənˈtəʊɪs; əˈlæntɔɪs/ n

a membranous sac growing out of the ventral surface of the hind gut of embryonic reptiles, birds, and mammals. It combines with the chorion to form the mammalian placenta

Etymology: 17th Century: New Latin, irregularly from Greek allantoeidēs sausage-shaped, allantoid

allantoic /ˌælənˈtəʊɪk/ adj

单词	allantois
释义	WordReference Random House Unabridged Dictionary of American English © 2024 al•lan•to•is (ə lan′tō is, -tois),USA pronunciation n. [Embryol., Zool.] Developmental Biology, Zoologya vascular, extraembryonic membrane of birds, reptiles, and certain mammals that develops as a sac or diverticulum from the ventral wall of the hindgut. Greek allantoeidé̄s, wrongly taken for plural and given a singular, on the model of words like hērōís (singular), hērōídes (plural) Neo-Latin 1640–50 Collins Concise English Dictionary © HarperCollins Publishers:: allantois /ˌælənˈtəʊɪs; əˈlæntɔɪs/ n a membranous sac growing out of the ventral surface of the hind gut of embryonic reptiles, birds, and mammals. It combines with the chorion to form the mammalian placenta Etymology: 17th Century: New Latin, irregularly from Greek allantoeidēs sausage-shaped, allantoid allantoic /ˌælənˈtəʊɪk/ adj
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