small (2 inches long) 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 of the cyclostomes | a means of enforcement |
the tiny fossil cone-shaped tooth of a primitive vertebrate of order Conodonta | toothlike structure in invertebrates found in the mouth or alimentary canal or on a shell |
| something resembling the tooth of an animal |
| one of a number of uniform projections on a gear |
| hard bonelike structures in the jaws of vertebrates; used for biting and chewing or for attack and defense |