thyroid: [18] The thyroid glands are situated in the neck, and they get their name ultimately from a comparison of the shape of the large oblong cartilage in front of the throat (which includes the Adam’s apple) with that of a door. The word comes via early modern French thyroide from Greek thuroidés ‘door-shaped’, an alteration of thureoeidés, which was derived from thúrā ‘door’ (a relative of English door). The term khóndros thureoiedés, literally ‘door-shaped cartilage’, was used by the Greek physician Galen for the ‘cartilage in front of the throat’ (now known in English as the thyroid cartilage). => door, foreign[thyroid etymology, thyroid origin, 英语词源]