English noun: atomic number 15 | |||
1. | atomic number 15 (substance) 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 | ||
Synonyms | P, phosphorus | ||
Broader (hypernym) | chemical element, element | ||
Substance meronym | apatite | ||