| unipennate | 1. Having a feather arrangement on one side; resembling one-half of a feather. 2. Denoting certain muscles with fibres running at an acute angle from one side of a tendon. Synonym: demipenniform. Origin: uni-+ L. Penna, feather (05 Mar 2000) |
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| unipennate muscle | <anatomy> A muscle with a lateral tendon to which the fibres are attached obliquely, like one half of a feather. Synonym: musculus unipennatus. (05 Mar 2000) |