Allantoidea

plural noun
Al·​lan·​toi·​dea | \ ˌalən‧ˈtȯidēə, ˌaˌlan‧-; əˌlantəˈwidēə\

Definition of Allantoidea

in some classifications
: a division of Vertebrata comprising all forms in which the embryo develops a complete allantois

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First Known Use of Allantoidea

1860, in the meaning defined above

History and Etymology for Allantoidea

New Latin, from allantoid-, allantois

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The first known use of Allantoidea was in 1860

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