Webster's Dictionary, 1913

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Photograph noun [ Photo- + -graph .] A picture or likeness obtained by photography.

Photograph transitive verb [ imperfect & past participle Photographed ; present participle & verbal noun Photographing .] To take a picture or likeness of by means of photography; as, to photograph a view; to photograph a group.

He makes his pen drawing on white paper, and they are afterwards photographed on wood.
Hamerton.

Also used figuratively.

He is photographed on my mind.
Lady D. Hardy.

Photograph intransitive verb To practice photography; to take photographs.

Photographer noun One who practices, or is skilled in, photography.

Photographic, Photographical adjective [ Confer French photographique .] Of or pertaining to photography; obtained by photography; used ib photography; as a photographic picture; a photographic camera. -- Pho`to*graph"ic*al*ly , adverb

Photographic printing , the process of obtaining pictures, as on chemically prepared paper, from photographic negatives, by exposure to light.

Photographist noun A photographer.

Photographometer noun [ Photograph + -meter .] (Photog.) An instrument for determining the sensibility of the plates employed in photographic processes to luminous rays.

Photographone noun [ See Photograph ; -phone .] A device, consisting essentially of an electric arc and a camera, by which a series of photographs of the variations of the arc due to sound waves are obtained for reproduction by means of a selenium cell and a telephone.

Photography noun [ Photo- + -graphy : confer French photographie .]
1. The science which relates to the action of light on sensitive bodies in the production of pictures, the fixation of images, and the like.

2. The art or process of producing pictures by this action of light.

» The well-focused optical image is thrown on a surface of metal, glass, paper, or other suitable substance, coated with collodion or gelatin, and sensitized with the chlorides, bromides, or iodides of silver, or other salts sensitive to light. The exposed plate is then treated with reducing agents, as pyrogallic acid, ferrous sulphate, etc., to develop the latent image. The image is then fixed by washing off the excess of unchanged sensitive salt with sodium hyposulphite ( thiosulphate ) or other suitable reagents.

Photogravure noun [ French] A photoengraving; also, the process by which such a picture is produced.

Photoheliograph noun [ Photo- + heliograph .] (Physics) A modified kind of telescope adapted to taking photographs of the sun.

Photoheliometer noun [ Photo- + heliometer .] (Astron.) A double- lens instrument for measuring slight variations of the sun's diameter by photography, utilizing the common chord of two overlapping images.

Photolithograph noun [ Photo- + lithograph .] A lithographic picture or copy from a stone prepared by the aid of photography.

Photolithograph transitive verb To produce (a picture, a copy) by the process of photolithography.

Photolithographer noun One who practices, or one who employs, photolithography.

Photolithographic noun Of or pertaining to photolithography; produced by photolithography.

Photolithography noun The art or process of producing photolithographs.

Photologic, Photological adjective Pertaining to photology, or the doctrine of light.

Photologist noun One who studies or expounds the laws of light.

Photology noun [ Photo- + -logy : confer French photologie .] The doctrine or science of light, explaining its nature and phenomena; optics.

Photoluminescent adjective [ Photo- + luminescent .] (Physics) Luminescent by exposure to light waves. -- Pho`to*lu`mi*nes"cence noun

Photomagnetic adjective Of or pertaining to photomagnetism.

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

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

Photometer noun [ Photo- + -meter : confer French photomètre .] (Physics) An instrument for measuring the intensity of light, or, more especially, for comparing the relative intensities of different lights, or their relative illuminating power.

Photometric, Photometrical adjective [ Confer French photométrique .] Of or pertaining to photometry, or to a photometer.

Photometrician noun One engaged in the scientific measurement of light.

Photometrician, Photometrist noun A specialist in photometry.

Photometry noun [ Confer French photométrie .] That branch of science which treats of the measurement of the intensity of light.

Photomezzotype noun [ Photo- + Italian mezzo middle, half + -type .] A photomechanical process similar to collotype.

Photomicrograph (fō`to*mī"kro*grȧf) noun [ Photo- + micro + -graph .]
1. An enlarged or macroscopic photograph of a microscopic object. See Microphotograph .

2. A microscopically small photograph of an object.

Photomicrography noun The art of producing photomicrographs.

Photonephograph (-nĕf"o*grȧf) noun [ Photo- + Greek ne`fos a cloud + -graph .] (Meteor.) A nephoscope registering by photography, commonly consisting of a pair of cameras used simultaneously.

Photophilous noun [ Photo- + Greek ... loving.] (Phytogeog.) Light-loving; growing in strong light, as many plants.

Photophobia noun [ New Latin , from Greek fw^s , fwto`s , light + ... fear.] (Medicine) A dread or intolerance of light. Sir T. Watson.

Photophone noun [ Photo- + Greek ... sound.] (Physics) An apparatus for the production of sound by the action of rays of light. A. G. Bell.

Photophonic adjective Of or pertaining to photophone.

Photophony noun The art or practice of using the photophone.

Photophore noun [ Photo- + Greek ... to bear.]
1. (Medicine) A form of endoscope using an electric light.

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

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

Photoprint noun Any print made by a photomechanical process.

Photopsia noun [ New Latin , from Greek fw^s , fwto`s , light + ... sight.] (Medicine) An affection of the eye, in which the patient perceives luminous rays, flashes, coruscations, etc. See phosphene .

Photopsy noun Same as Photopsia .

Photorelief noun A printing surface in relief, obtained by photographic means and subsequent manipulations. Knight.

Photoscope noun [ Photo- + -scope .] (Physics) Anything employed for the observation of light or luminous effects.

Photoscopic adjective Of or pertaining to the photoscope or its uses.

Photosculpture noun [ Photo- + sculpture .] A process in which, by means of a number of photographs simultaneously taken from different points of view on the same level, rough models of the figure or bust of a person or animal may be made with great expedition.

Photosphere noun [ Photo- + sphere .] A sphere of light; esp., the luminous envelope of the sun.

Photospheric adjective Of or pertaining to the photosphere.

Photosynthesis noun (Plant Physiol.) The process of constructive metabolism by which carbohydrates are formed from water vapor and the carbon dioxide of the air in the chlorophyll-containing tissues of plants exposed to the action of light. It was formerly called assimilation , but this is now commonly used as in animal physiology. The details of the process are not yet clearly known. Baeyer's theory is that the carbon dioxide is reduced to carbon monoxide, which, uniting with the hydrogen of the water in the cell, produces formaldehyde, the latter forming various sugars through polymerization. Vines suggests that the carbohydrates are secretion products of the chloroplasts, derived from decomposition of previously formed proteids. The food substances are usually quickly translocated, those that accumulate being changed to starch, which appears in the cells almost simultaneously with the sugars. The chloroplasts perform photosynthesis only in light and within a certain range of temperature, varying according to climate. This is the only way in which a plant is able to organize carbohydrates. All plants without a chlorophyll apparatus, as the fungi, must be parasitic or saprophytic. -- Pho`to*syn*thet"ic adjective -- Pho`to*syn*thet"ic*al*ly adverb

Phototaxis, Phototaxy noun [ New Latin phototaxis ; photo- + Greek ... an arranging.] (Biol.) The influence of light on the movements of low organisms, as various infusorians, the zoöspores of certain algæ, etc.; also, the tendency to follow definite directions of motion or assume definite positions under such influence. If the migration is toward the source of light, it is termed positive phototaxis ; if away from the light, negative phototaxis . -- Pho`to*tac"tic adjective -- Pho`to*tac"tic*al*ly , adverb

Phototelegraphy noun Telegraphy by means of light, as by the heliograph or the photophone. Also, less properly, telephotography. -- Pho`to*tel"e*graph noun -- Pho`to*tel`e*graph"ic adjective