[ 'kəʊnədɒnt ]
■ noun Palaeontology an extinct marine creature with a long worm-like body and numerous small teeth, now believed to be the earliest vertebrate.
↘(also ~ element ) a tooth of a ~, often found as a fossil.
Origin
C19: from mod. L. Conodonta (name of a class), from Gk kōnos 'cone' + odous , odont- 'tooth'.