Serpent's tongue

Also found in: Idioms.
(Paleon.) the fossil tooth of a shark; - so called from its resemblance to a tongue with its root.

See also: Serpent

References in periodicals archive ?
We have all felt the sharp nip of the serpent's tongue, that stinging ingratitude, the let down, the complete miscarriage of faith in a friend.
He got drunk, stood up and said, 'How sharper than a serpent's tongue it is to have a thankless child.
MW works fantastically and is sharper than a serpent's tongue.
With her chirpy, conversational delivery bouncing along a cheery mix of gurgling synthesizers and dub reggae grooves, Allen reveals a serpent's tongue, salt-on-the-wound lyrics and a vindictive streak that seems to contradict the pop-friendly melody and perky voice.