a radioactive isotope of phosphorus, used as a chemotherapeutic agent.
A radioactive beta-emitting isotope of phosphorus having a half-life of 14.3 days and used as a tracer in studies of the metabolism of nucleic acids and phospholipids, and also used in the treatment of certain diseases of the osseous and hematopoietic systems.
[fos-fer-uh s] /ˈfɒs fər əs/ noun 1. . /ˈfɒsfərəs/ noun 1. an allotropic nonmetallic element occurring in phosphates and living matter. Ordinary phosphorus is a toxic flammable phosphorescent white solid; the red form is less reactive and nontoxic: used in matches, pesticides, and alloys. The radioisotope phosphorus-32 (radiophosphorus), with a half-life of 14.3 days, is […]
[pen-tok-sahyd, -sid] /pɛnˈtɒk saɪd, -sɪd/ noun, Chemistry. 1. a white, deliquescent, crystalline powder, P 2 O 5 , that, depending upon the amount of water it absorbs, forms orthophosphoric acid, metaphosphoric acid, or pyrophosphoric acid, produced by the burning of phosphorus in dry air: used in the preparation of phosphoric acids, as a drying and […]
[ses-kwi-suhl-fahyd] /ˌsɛs kwɪˈsʌl faɪd/ noun 1. (not in scientific use) a yellow, crystalline, flammable substance, P 4 S 3 , insoluble in cold water and decomposed by hot water: used chiefly in organic synthesis and in the manufacture of matches.
noun, Chemistry. 1. a clear, colorless, fuming liquid, PCl 3 , used chiefly in organic synthesis as a chlorinating agent.