apertognathia a·per·tog·na·thi·a (ə-pûr’tŏg-nā’thē-ə, -tō-nāth’ē-ə)
A type of malocclusion characterized by the premature occlusion of posterior teeth and the absence of anterior occlusion. Also called open bite.
- Apert-crouzon syndrome
apert-crouzon syndrome Apert-Crouzon syndrome A·pert-Crouzon syndrome (ə-pěr’-) n. See type II acrocephalosyndactyly.
an instrument for measuring the angular and of the objective lens of a microscope.
an opening, as a hole, slit, crack, gap, etc. Also called aperture stop. Optics. an opening, usually circular, that limits the quantity of light that can enter an optical instrument. Contemporary Examples His book of essays, Photography After Frank , was recently published by aperture. Hai Bo and China’s Photography Boom Philip Gefter January 19, […]
- Aperture card
a punched-card mounting for microfilmed pages.