ATOMIC NUMBER 15

 I. (noun) 

Sense 1

Meaning:

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:

atomic number 15; P; phosphorus

Classified under:

Nouns denoting substances

Hypernyms ("atomic number 15" is a kind of...):

chemical element; element (any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter)

Holonyms ("atomic number 15" is a substance of...):

apatite (a common complex mineral consisting of calcium fluoride phosphate or calcium chloride phosphate; a source of phosphorus)

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