Phosphorus - Definition
phosphorus
n 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 [syn: phosphorus,
P, atomic number 15]
2: a planet (usually Venus) seen just before sunrise in the
eastern sky [syn: morning star, daystar, Phosphorus,
Lucifer]