Related Words

Closed PHO: A type of physician-hospital organization that typically limits the number of participating specialists by type of specialty.

Photo-Reportage: Use of photographs in newspapers and magazines, to supplement or replace written journalistic accounts.

Photo-Etching: Technique of contact printing an image on lith film on a presensitized zinc plate which is then processed and chemically etched to give a relief image.

Photo-Resistor: Photoelectric cell which varies in its electrical resistance according to the light received.

Photo-Silkscreening: Method of silkscreening images, using a stencil produced photographically.

Photochemistry: The study of chemical changes caused by light. For example, many of the key reactions that generate smog are photochemical.

Photo-Transistor: Light sensitive electronic component which functions as a switch. Used for slave firing of electronic flash heads.

Photo-Engraving: Production of a relief printing surface by chemical or mechanical means, with the aid of photography.

Photo-Electric Cell: Light sensitive cell. Two types are used in exposure meters. A selenium cell generates electricity in proportion to the amount of light falling upon its surface. A cadmium sulfide cell offer . . . View Full Definition

Photo File Index Print: Makes ordering reprints and enlargements easy. A small print shows a positive, 'thumbnail' version of every picture on an aps roll. Each thumbnail picture is numbered on the index print to m . . . View Full Definition