‖n. [ NL., from Gr. me`ros part. ] (Arch.) The plain surface between the channels of a triglyph. [ Written also merus. ] Weale. [ 1913 Webster ]
n. [ Gr. me`ros part + -some body. ] (Zool.) One of the serial segments, or metameres, of which the bodies of vertebrate and articulate animals are composed. [ 1913 Webster ]
‖prop. n. pl. [ NL., fr. Gr. me`ros thigh + &unr_;, -&unr_;, mouth. ] (Zool.) A class of Arthropoda, allied to the Crustacea. It includes the trilobites, Eurypteroidea, and Limuloidea. All are extinct except the horseshoe crabs (Limulus) of the last group. See Limulus. [ 1913 Webster ]