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Of or pertaining to photomagnetism.

The branch of science which treats of the relation of magnetism to light.

Pertaining to, or designating, any photographic process in which a printing surface is obtained without the intervention of hand engraving.

An instrument for measuring the intensity of light, or, more especially, for comparing the relative intensities of different lights, or their relative illuminating power.

Of or pertaining to photometry, or to a photometer.

One engaged in the scientific measurement of light.

A specialist in photometry.

That branch of science which treats of the measurement of the intensity of light.

A photomechanical process similar to collotype.

An enlarged or macroscopic photograph of a microscopic object. See Microphotograph.

The art of producing photomicrographs.

A nephoscope registering by photography, commonly consisting of a pair of cameras used simultaneously.

Light-loving; growing in strong light, as many plants.

A dread or intolerance of light. Sir T. Watson.

An apparatus for the production of sound by the action of rays of light. A. G. Bell.

Of or pertaining to photophone.

The art or practice of using the photophone.

(Zoöl.) A light-emitting organ; specif., one of the luminous spots on certain marine (mostly deep-sea) fishes.

A play for representation or exhibition by moving pictures; also, the moving-picture representation of a play.

Any print made by a photomechanical process.