Entry 1 sense Webster, 1913 Thyroarytenoid · Thy·ro·a·ryt·e·noid · IPA /ˌθaɪ.ɹoʊˌæɹ.əˈti.nɔɪd/ 01 a. Of or pertaining to both the thyroid and arytenoid cartilages of the larynx. 1. Of or pertaining to both the thyroid and arytenoid cartilages of the larynx.(Anat.)