Entry 1 sense Webster, 1913 Thyrohyoid · Thy·ro·hy·oid · IPA /ˌθaɪ.ɹoʊˈhaɪˌɔɪd/ 01 a. Of or pertaining to the thyroid cartilage of the larynx and the hyoid arch. 1. Of or pertaining to the thyroid cartilage of the larynx and the hyoid arch.(Anat.)