thy·ro·ar·y·te·noi·de·us \ˈthīrōˌarəd.əˈnȯidēəs\noun alsothy·ro·arytenoid\|thīrō+\ Etymology: New Latin thyroarytenoideus, from thyroarytenoides : a muscle extending between the thyroid and arytenoid cartilages and serving to relax and shorten the vocal cords