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

单词

placentals

释义

placenta /plə-senˈtə/

noun (pl placenˈtae /-tē/ or placenˈtas)

In mammals, the flattened structure formed by the intimate union of the allantois and chorion with the uterine wall of the mother, serving for the respiration and nutrition of the growing young (zoology)
The part of the ovary of a flowering plant that bears the ovules (botany)
Any mass of tissue bearing sporangia or spores

ORIGIN: L placenta a flat cake, from Gr plakoeis (contraction of plakous) from plax, plakos anything flat

placenˈtal adjective noun

A placental mammal

Placentalia /plas-ən-tāˈli-ə/ plural noun

Eutheria, the subclass of placental mammals

placentāˈtion noun

The arrangement and mode of attachment of placentae or of placenta and fetus

placentˈiform adjective

Cake-shaped

placentolˈogy noun

The scientific study of placentae

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