Shaped like a half-moon or crescent.
- ‘It has been found lying upon the semilunar fascia of the biceps, and over the aponeurosis of the forearm, instead of beneath those structures.’
- ‘In any event, the semilunar depression is a hallmark of archosauriforms, but is unknown in crown group archosaurs.’
- ‘Even more so than in Morganucodon, the anterior lamina of the petrosal is medially convex, leaving deep fossa for the semilunar ganglion, the root node of the trigeminal nerve.’
- ‘With the exception of two cases, there was no pathology on the semilunar leaflets of aorta.’
- ‘In human anatomy, this is the fold of skin covering the inner corner of the eye, normally from the top of the eye downward in a semilunar form.’
Late Middle English: from medieval Latin semilunaris (see semi-, lunar).