| phosphorus-33 | A radioactive isotope of phosphorus with a half-life of 25.3 days; used as a tracer in metabolic studies. (05 Mar 2000) |
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| phosphorus acids | Inorganic acids that contain phosphorus as an integral part of the molecule. (12 Dec 1998) |
| phosphorus compounds | Inorganic compounds that contain phosphorus as an integral part of the molecule. (12 Dec 1998) |
| phosphorus, dietary | Phosphorus used in foods or obtained from food. This element is a major intracellular component which plays an important role in many biochemical pathways relating to normal physiological functions. High concentrations of dietary phosphorus can cause nephrocalcinosis which is associated with impaired kidney function. Low concentrations of dietary phosphorus cause an increase in calcitriol in the blood and osteoporosis. (12 Dec 1998) |
| phosphorus isotopes | Stable phosphorus atoms that have the same atomic number as the element phosphorus, but differ in atomic weight. P-31 is a stable phosphorus isotope. (12 Dec 1998) |
| phosphorus metabolism disorders | Disorders in the processing of phosphorus in the body: its absorption, transport, storage, and utilization. (12 Dec 1998) |
| phosphorus-oxygen lyases | <enzyme> Enzymes that catalyze the cleavage of a phosphorus-oxygen bond by means other than hydrolysis or oxidation. Registry number: EC 4.6 (12 Dec 1998) |
| phosphorus pentoxide | P2O5;the ultimate anhydride of orthophosphoric acid; a drying and dehydrating agent; corrosive. (05 Mar 2000) |
| phosphorus radioisotopes | Unstable isotopes of phosphorus that decay or disintegrate emitting radiation. P atoms with atomic weights 28-34 except 31 are radioactive phosphorus isotopes. (12 Dec 1998) |