a means of enforcement | 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 |
toothlike structure in invertebrates found in the mouth or alimentary canal or on a shell | the tiny fossil cone-shaped tooth of a primitive vertebrate of order Conodonta |
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 | |