Pronunciation: (sō'mīt), [key]
1. any of the longitudinal series of segments or parts into which the body of certain animals is divided; a metamere.
2. Embryol.one member of a series of paired segments into which the thickened dorsal zone of mesoderm is divided.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.