- SYN: semipennate.
* * *demi·pen·ni·form (dem″e-penґĭ-form) feather-shaped as to one of the two margins; said of certain muscles.
Medical dictionary. 2011.
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semipennate — 1. Having a feather arrangement on one side; resembling one half of a feather. 2. Denoting certain muscles with fibers running at an acute angle from one side of a tendon. SYN: unipennate, demipenniform … Medical dictionary