definition of
p

[1] #1 p n. [phosphorus, P, atomic number 15] 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. wn

[2] #2 p n. [P] the 16th letter of the Roman alphabet. wn

[3] #3 p n. [P] the 16th letter of the Roman alphabet. wn