SINCE 1828
Anallantoidea
plural noun
An·al·lan·toi·dea
| \
¦aˌnalənˈtȯidēə ,
-naˌlanˈ- \
Definition of Anallantoidea
: the division of Vertebrata, including amphibians, fishes, and cyclostomes, in which no allantois, or at most a rudimentary one, is developed — compare anamniota
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