allantoic

al·lan·to·ic

[al-uhn-toh-ik]
adjective
of or pertaining to the allantois.

Origin:
1830–40; allanto(is) + -ic

post·al·lan·to·ic, adjective
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World English Dictionary
allantois (ˌælənˈtəʊɪs, əˈlæntɔɪs) [Click for IPA pronunciation guide]
 
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
 
[C17: New Latin, irregularly from Greek allantoeidēs sausage-shaped, allantoid]
 
allantoic
 
adj

Collins English Dictionary - Complete & Unabridged 10th Edition
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00:10
Allantoic is always a great word to know.
So is callithumpian. Does it mean:
a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.
a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.
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