P

1. Educ. (as a rating of student performance) passing.

2. Chess. pawn.

3. Electronics. plate.

4. poor.

5. Gram. predicate.

6. Protestant.

Symbol.

1. the 16th in order or in a series, or, when I is omitted, the 15th.

2. (sometimes l.c.) the medieval Roman numeral for 400. Cf. Roman numerals.

3. Genetics. parental.

4. Chem. phosphorus.

5. Physics.

a. power.

b. pressure.

c. proton.

d. See space inversion.

e. poise².

6. Biochem. proline.

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