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Wiktionary(0.00 / 0 votes)Rate this definition: 1  arytenoid(Noun) Either of a pair of movable cartilages in the larynx that serve as posterior attachment points for the vocal folds; a muscle attached to this cartilage, or a gland located near it. 2  arytenoid(Adjective) Of, or relating to this cartilage, muscle or gland.
see laryngeal chondritis. arytenoid cartilage. one of the paired laryngeal cartilages in the dorsal part of the larynx that provides attachment for the muscles that adduct and abduct the vocal cords. The cartilages form the dorsal boundary of the rima glottis, the vocal cords the ventral boundary. arytenoid chondritis.