The American Heritage® Dictionary of the English Language, 4th Edition
n. Any of the homologous segments, lying in a longitudinal series, that compose the body of certain animals, such as earthworms and lobsters. Also called somite.
n. One of successive or homodynamous parts in animals and plants; one of a series of similar parts that follow one another in a vertebrate or articulate animal, as in an earthworm; a segment or somite.
the GNU version of the Collaborative International Dictionary of English
n. One of successive or homodynamous parts in animals and plants; one of a series of similar parts that follow one another in a vertebrate or articulate animal, as in an earthworm; a segment; a somite. See Illust. of loeven's larva.
The Century Dictionary and Cyclopedia
n. In zoology, one of a longitudinal series of parts which are serially homologous with one another. See metameric, metamerism.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. one of a series of similar body segments into which some animals are divided longitudinally
Word Usage
"One bead, one carriage, one vertebra, would be a metamere."