from The Century Dictionary.
- A hypothetical group of animals having the form of a ciliated planula and the morphological valence of a blastula, supposed to have arisen in the primordial geologic period in the direct line of descent of the remote ancestors of the human race.
Sorry, no etymologies found.
Help support Wordnik (and make this page ad-free) by adopting the word planæadæ.
Sorry, no example sentences found.
Log in or sign up to get involved in the conversation. It's quick and easy.