P1
(also p)
¦ noun (plural Ps or P's)
1. the sixteenth letter of the alphabet.
2. denoting the next after O in a set of items, categories, etc.
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P2
¦ abbreviation
1. (in tables of sports results) games played.
2. (on road signs and street plans) parking.
3. peta- (1015).
4. Physics poise (unit of viscosity).
5. Portugal (international vehicle registration).
6. proprietary.
¦ symbol the chemical element phosphorus.