lepidosauria

from The Century Dictionary.

• In some systems, a subclass or suborder of Reptilia, including reptiles with scales and plates, with limbs or without, and with the anal cleft transverse and the penis double.

from the GNU version of the Collaborative International Dictionary of English.

• noun plural (Zoöl.) A division of reptiles, including the serpents and lizards; the Plagiotremata.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun diapsid reptiles: lizards; snakes; tuataras