(n) 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
n. [ Gr. kw^nos cone + 'odoy`s, 'odo`ntos, tooth. ] (Zool.) A peculiar toothlike fossil of many forms, found especially in carboniferous rocks. Such fossils are supposed by some to be the teeth of marsipobranch fishes, but they are probably the jaws of annelids. [ 1913 Webster ]
n. an extinct order of primitive vertebrates; the precise taxonomy is not clear; in some classifications it is considered a separate phylum. Syn. -- order Conodonta, Conodontophorida, order Conodontophorida. [ WordNet 1.5 ]
n. [ Gr. kwnoeidh`s conical; kw^nos cone + e'i^dos form: cf. F. conoïde. ] 1. Anything that has a form resembling that of a cone. [ 1913 Webster ]
2. (Geom.) (a) A solid formed by the revolution of a conic section about its axis; as, a parabolic conoid, elliptic conoid, etc.; -- more commonly called paraboloid, ellipsoid, etc. (b) A surface which may be generated by a straight line moving in such a manner as always to meet a given straight line and a given curve, and continue parallel to a given plane. Math. Dict. [ 1913 Webster ]
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