Muscle plate

muscle plate –>
myotome
(Science: anatomy) A muscular segment; one of the zones into which the muscles of the trunk, especially in fishes, are divided; a myocomma.
One of the embryonic muscular segments arising from the protovertebrae; also, one of the protovertebrae themselves.
The muscular system of one metamere of an articulate.
See: myotomy.