from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A primitive fin, like that of Ceratodus.
from the GNU version of the Collaborative International Dictionary of English
- n. The primitive form of fin, like that of Ceratodus.
from The Century Dictionary and Cyclopedia
- n. The archetypal form or primitive type of the skeleton of the limbs of vertebrates.
New Latin, from Ancient Greek. (Wiktionary)
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