CHORION
chorion
(noun) the outermost membranous sac enclosing the embryo in higher vertebrates (reptiles, birds and mammals)
Source: WordNet® 3.1
Etymology
Noun
chorion (plural chorions or choria)
(anatomy, biology) The protective and nutritive membrane in higher vertebrates that attaches the fetus to the uterus.
(biology, entomology) The outer case of an insect egg.
(botany) The outer membrane of seeds of plants.
Source: Wiktionary
Cho"ri*on, n. Etym: [NL., fr. Gr.
1. (Anat.) (a) The outer membrane which invests the fetus in the womb; also, the similar membrane investing many ova at certain stages of development. (b) The true skin, or cutis.
2. (Bot.)
Definition: The outer membrane of seeds of plants.
Source: Webster’s Unabridged Dictionary 1913 Edition
Recent Word Finds
Word of the Day
6 May 2025
HEEDLESS
(adjective) marked by or paying little heed or attention; “We have always known that heedless self-interest was bad morals; we know now that it is bad economics”--Franklin D. Roosevelt; “heedless of danger”; “heedless of the child’s crying”
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