• (n. pl.) A division of serpents which have some of the posterior maxillary teeth grooved for fangs.
O·pis`tho·glyph'a noun plural [ New Latin , from Greek ... behind + ... to carve.] (Zoology) A division of serpents which have some of the posterior maxillary teeth grooved for fangs. 
opisthoglyph, opisthoglypha, opisthoglyphic, opisthoglyphous A snake belonging to a group characterized by grooves in the upper back teeth.