A genus of Amphibia including various species of toads.

Toadstone, or fossil-teeth of the anarrhicas or sea-wolf, formerly much esteemed for its imaginary virtues and worn in rings. It was named from an opinion that it was found in the head of a toad.

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 oolite and chalk formations; toadstone; -- so named from a notion that it was originally formed in the head of a toad.