Possible predecessor of the cyclostomes

• Late Cambrian to late Triassic
• Small (2 in) extinct eellike fish with a finned tail and a notochord and having cone-shaped teeth containing cellular bone

Wikipedia Word definitions in Wikipedia
Conodonts ( Greek kōnos , " cone ", + odont , " tooth ") are extinct chordates resembling eels, classified in the class Conodonta . For many years, they were known only from tooth-like microfossils found in isolation and now called conodont elements . Knowledge ...

WordNet Word definitions in WordNet
n. tiny fossil cone-shaped tooth of the most primitive vertebrate: the conodont small (2 in) extinct eellike fish with a finned tail and a notochord and having cone-shaped teeth containing cellular bone; late Cambrian to late Triassic; possible predecessor ...

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Conodont \Co"no*dont\ (k[=o]"n[-o]*d[o^]nt), n. [Gr. kw^nos cone + 'odoy`s, 'odo`ntos, tooth.] (Zo["o]l.) A peculiar toothlike fossil of many forms, found especially in carboniferous rocks. Such fossils are supposed by some to be the teeth of ...

Wiktionary Word definitions in Wiktionary
n. 1 Any of several extinct fishlike chordates that had conelike teeth 2 A microfossil tooth of such an animal