myotome

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my·o·tome

 (mī′ə-tōm′)
n.
1. A segmental mass of mesoderm in a vertebrate embryo that differentiates into skeletal muscle.
2. A muscle or group of muscles derived from one somite and innervated by a single segment of a spinal nerve.
3. A knife for dividing muscle during surgery.

myotome

(ˈmaɪəˌtəʊm)
n
1. (Zoology) any segment of embryonic mesoderm that develops into skeletal muscle in the adult
2. (Zoology) any of the segmentally arranged blocks of muscle in lower vertebrates such as fishes
References in periodicals archive ?
In the location of these accumulations it was absent the muscle plate of the mucous membrane and submucosal base of the intestine was combined with the proper mucous plate.
A fold (orange arrow, left) in a turtle's muscle plate that forms in the embryonic stage leads to an unusual body plan with the scapulae, or shoulder blades, inside the ribs.