Copyright © 2026 Kotomora. All Rights Reserved.

Words Kanji Guides About

尿膜 (にょうまく) Japanese meaning | Kotomora

尿にょう膜まく

Meanings

1

noun

allantois

embryology

Embryological term for the fetal membrane involved in gas exchange and waste storage in reptiles, birds, and mammals.

尿にょう膜まくは爬は虫ちゅう類るいや鳥ちょう類るいの胚はいで発はっ達たつする。
The allantois develops in the embryos of reptiles and birds.

Kanji

尿urine
膜membrane

Similar words

羊よう膜まく
羊膜 is the amnion, the membrane that directly surrounds the embryo, while 尿膜 is the allantois, a separate sac-like structure.
漿しょう膜まく
漿膜 is the serosa or serous membrane, a different extraembryonic membrane from the allantois.

Etymology

From 尿 (urine) + 膜 (membrane), referring to its role in storing embryonic waste. The exact historical derivation is uncertain.