1. Small (2 inches long) extinct eel-like 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
   "Conodonts are important index fossils for dating Paleozoic rocks"
    
2. The tiny fossil cone-shaped tooth of a primitive vertebrate of order Conodonta
   "The palaeontologist carefully extracted conodonts from the limestone sample"

Derived forms: conodonts

Type of: agnathan, chopper [informal], jawless fish, jawless vertebrate, tooth

Part of: Conodonta, Conodontophorida, order Conodonta, order Conodontophorida

Encyclopedia: Conodont