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1. A multivalent nonmetallic element of the nitrogen family that occurs commonly in inorganic phosphate rocks and as organic phosphates in all living cells; is highly reactive and occurs in several allotropic forms
   - P, atomic number 15

1. A planet (usually Venus) seen just before sunrise in the eastern sky
   - morning star, daystar, Lucifer

Sounds like: phosphorous

Derived forms: phosphoruses

See also: phosphoric

Type of: chemical element, element, major planet, planet

Part of: apatite

Encyclopedia: Phosphorus