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Webster 1913 Edition

Noun.

[See

(Anat.)

(a)

A muscular segment; one of the zones into which the muscles of the trunk, especially in fishes, are divided; a myocomma.

(b)

One of the embryonic muscular segments arising from the protovertebrae; also, one of the protovertebrae themselves.

(c)

The muscular system of one metamere of an articulate.

myotome ‎(plural myotomes)

(biology) In vertebrate embryonic development, a group of tissues formed from somites that develop into the body wall muscle.