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phosgene a highly volatile, colorless liquid or gas that is poisonous and is used as a chemical weapon and in the manufacture of products such as glass and plastics.
phosphate a salt or ester of a phosphoric acid. [3 definitions]
phosphate rock sedimentary rocks that contain large amounts of calcium phosphate, used in making fertilizer, phosphorous chemicals, and the like.
phosphatide a lipid compound, such as lecithin, that contains both phosphoric acid and glycerol and occurs in the fatty tissue of cellular organisms.
phosphide a chemical compound made of trivalent phosphorus and a radical or another element.
phosphite a salt of phosphorous acid.
phosphor any of a variety of substances that become luminescent from the absorption of radiation.
phosphorate to impregnate or combine with phosphorus. [2 definitions]
phosphoresce to display, produce, or undergo phosphorescence.
phosphorescence the emission of light with little heat that results from the absorption of radiation and persists after the radiation exposure has ceased. [2 definitions]
phosphoreted impregnated or combined with phosphorus.
phosphoric of, containing, or pertaining to phosphorus, esp. pentavalent phosphorus.
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.