Ps

'Ps'

[postscript.n.01] as in: a note appended to a letter after the signature

'Ps'

[phosphorus.n.01] as in: 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

'Ps'

[p.n.02] as in: the 16th letter of the Roman alphabet