gelatin, coated on a glass plate, that carries an image to be printed by the collotype process

The use of aerial photography to interpret geologic features

The use of aerial photography to interpret geologic features

A goniometer, used in X-ray diffraction, that detects the X-rays using a photocell.

Of, relating to, indicated by, or produced by photogeology.

(sciences) A photoglow tube

A photograph made without using a camera; normally by placing an object in contact with photosensitive paper and exposing it to light

(obsolete) A photograph. / (archaic) An afterimage.

(genetics) A gene involved in photosynthesis.

(uncountable) An intaglio process for printing photographic reproductions in newspapers and books. / (countable) A print so made.