Definition of semilunar in English:



  • 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.’
    • ‘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.’
    • ‘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.’


Late Middle English: from medieval Latin semilunaris (see semi-, lunar).