n. plEmydea(Zoöl) A group of chelonians which comprises many species of fresh-water tortoises and terrapins.
Century Dictionary and Cyclopedia
emydeaThe name given by Huxley to a group of the Chelonia, having usually horny cutting jaws, uncovered by lips, the tympanum exposed, the limbs slenderer than in Testudinea, with 5-clawed digits united by a web only, and the horny plates of the carapace and plastron well developed. The Emydea as thus defined compose the river- and marsh-tortoises, and are divisible into two groups, the terrapins and the chelodines. See terrapin, Chelodines.
Webster's Revised Unabridged Dictionary
NL., fr. Emys, a genus of tortoises, L. emys, a kind of fresh-water tortoise, Gr.