p /ˈpi/
 字母p
 p
 p-n-p電晶體
 P the sixteenth letter of the English alphabet, is a nonvocal consonant whose form and value come from the Latin, into which language the letter was brought, through the ancient Greek, from the Phœnician, its probable origin being Egyptian.  Etymologically P is most closely related to b, f, and v; as hobble, hopple; father, paternal; recipient, receive. See B, F, and M.
 See Guide to Pronunciation, §§ 247, 248, and 184-195.
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 P
      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,
            atomic number 15]
      2: the 16th letter of the Roman alphabet