Transcription
-
- US Pronunciation
- US IPA
- UK Pronunciation
- UK IPA
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- [uh-lan-toh-is, -tois]
- /əˈlæn toʊ ɪs, -tɔɪs/
- /ˈalantwˌɑː/
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- US Pronunciation
- US IPA
-
- [uh-lan-toh-is, -tois]
- /əˈlæn toʊ ɪs, -tɔɪs/
Definitions of allantois word
- noun allantois 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 3
- noun allantois a membranous pouch with a rich blood supply in the embryos of birds, reptiles, and mammals: it is an organ of respiration and excretion for embryonic birds and reptiles: in mammals it helps form the placenta 3
- noun allantois a vascular, extraembryonic membrane of birds, reptiles, and certain mammals that develops as a sac or diverticulum from the ventral wall of the hindgut. 1
- noun allantois The fetal membrane lying below the chorion in many vertebrates, formed as an outgrowth of the embryo’s gut. In birds and reptiles it grows to surround the embryo; in eutherian mammals it forms part of the placenta. 1
- noun allantois (anatomy) A sac, having a number of functions, that develops in the alimentary canal of the embryos of mammals, birds and reptiles. 0
Information block about the term
Origin of allantois
First appearance:
before 1640 One of the 44% oldest English words
1640-50; < New Latin < Greek allantoeidḗs, wrongly taken for plural and given a singular, on the model of words like hērōís (singular), hērōídes (plural)
Historical Comparancy
Parts of speech for Allantois
noun
adjective
verb
adverb
pronoun
preposition
conjunction
determiner
exclamation
allantois popularity
A common word. It’s meaning is known to most children of preschool age. About 90% of English native speakers know the meaning and use the word.
This word is included in each student's vocabulary. Most likely there is at least one movie with this word in the title.
allantois usage trend in Literature
This diagram is provided by Google Ngram ViewerTop questions with allantois
- what is the function of the allantois?
- what is allantois?
- what is an allantois?
- what is the function of allantois?
See also
Matching words
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- Words starting with allantois