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
anallantoidean\-¦tȯidēən\ adjective or noun
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Origin and Etymology of anallantoidea
New Latin, from an- + allantois + -idea
First Known Use: 1860
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