Word | Noun | Adjective | Verb | Adverb |
---|---|---|---|---|
jawless vertebrate | Yes | No | No | No |
heterostracan | Yes | No | No | No |
jawless vertebrate (noun) | heterostracan (noun) |
---|---|
eel-shaped vertebrate without jaws or paired appendages including the cyclostomes and some extinct forms | extinct jawless fish with the anterior part of the body covered with bony plates; of the Silurian and Devonian |