Bu"fon*ite (?), n. [L. bufo toad:
cf. F. bufonite.] (Paleon.) An old name for a fossil
consisting of the petrified teeth and palatal bones of fishes belonging to
the family of Pycnodonts (thick teeth), whose remains occur in the
oölite and chalk formations; toadstone; -- so named from a notion that
it was originally formed in the head of a toad.