Che·lo·ni·a n. pl. Zool. An order of reptiles, including the tortoises and turtles, peculiar in having a part of the vertebræ, ribs, and sternum united with the dermal plates so as to form a firm shell. The jaws are covered by a horny beak. See Reptilia; also, Illust. in Appendix.
n 1: green turtles [syn: genus Chelonia]
2: tortoises and turtles [syn: order Chelonia, Testudinata,
order Testudinata, Testudines, order Testudines]