Main Entry: pros·thi·on Pronunciation: 'präs-thE-"än Function: noun : a point on the alveolar arch midway between the median upperincisor teeth called also alveolar point
prosthion pros·thi·on (prŏs'thē-ŏn') n. The most anterior point on the maxillary alveolar process, between the central incisor teeth. Also called alveolar point.