Definitions
1.Adverbpianissimo
2.Adverbper procurationem - Latin for by agency or by proxy - used on a letter to indicate that has been signed on somebody else's behalf.
3.NounInitialism of percentage point.
4.NounInitialism of past participle.
5.Nounproton and proton (used attributively to describe a collision or other interaction of these two particles)
6.NounEye dialect spelling of pee-pee.
7.AdverbInitialism of per person.
8.NounAbbreviation of pages (plural of p).