| phosphoric acid |
any of several oxygen acids of phosphorus that are used in fertilizers, detergents, pharmaceuticals, and food flavorings. |
| phosphorous |
of, like, containing, or pertaining to phosphorus, esp. trivalent phosphorus. |
| phosphorous acid |
a white or yellowish crystalline acid that readily absorbs oxygen and is used as a chemical reducing agent and to produce phosphite salts. |
| phosphorus |
a chemical element that has fifteen protons in each nucleus, that is found naturally only in compounds, esp. biologically essential compounds such as calcium phosphates and nucleotide phosphates, and that can be isolated in various allotropic forms, one of which is a poisonous whitish yellow solid that is luminous at room temperature because of slow oxidation. (symbol: P) [2 definitions] |
| photic |
of or pertaining to light. [2 definitions] |
| photo |
(informal) a photograph. |
| photo- |
light. [2 definitions] |
| photochemistry |
the scientific study of the chemical action and effects of light. |
| photochromic |
designating a transparent material such as specially treated glass or film that turns dark when exposed to light and returns to normal when the light is removed. |
| photochronograph |
a former device used to take a rapid series of photographs of the same moving object, so as to be able to reproduce the motion. |
| photocoagulation |
a technique using intense light energy, such as a laser beam, to produce scar tissue, as in the treatment of certain eye disorders, and in biological research. |
| photocompose |
to set (written material) by the technique of photocomposition. |
| photocomposer |
a machine used for photocomposition. |
| photocomposition |
a process for composing type from the projection of type character images on photographic film, from which the printing plates are made. |
| photoconductive |
displaying a change in electrical conductivity upon absorption of light or other radiation. |
| photocopier |
a machine used to make photographic copies. |
| photocopy |
a photographic copy of a document or other printed material. [2 definitions] |
| photodetector |
an electronic device containing one or more photodiodes that converts photons to electrons. |
| photodiode |
a device consisting of a semiconductor sensitive to light that functions as a photoelectric cell. |
| photoduplicate |
to make a photographic copy or copies of; photocopy. [2 definitions] |
| photodynamics |
(used with a sing. verb) the effect of light on the growth and movement of plants or other organisms. [2 definitions] |