Anallantoidea

plural noun An·al·lan·toi·dea \¦aˌnalənˈtȯidēə, -naˌlanˈ-\

Definition of Anallantoidea

  1. :  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

Love words? You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Join MWU now and get access to America’s largest dictionary, with:

  • 300,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

Origin and Etymology of anallantoidea

New Latin, from an- + allantois + -idea


First Known Use: 1860


Seen and Heard

What made you want to look up Anallantoidea? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

to criticize severely

Get Word of the Day daily email!