The symbol for phosphorus.

The most feared letter that could be typed in a URL as the first letter by a parent or peer attempting to use your device to search something. Especially stressful if continued by the letters O and then R.

The 16th letter of the English alphabet → mind your p’s and q’sExamples from the CorpusP• We furthermore demonstrate that plexiglass in combination with lead shields 32 P induced Bremsstrahlung more efficiently than plexiglass alone.• To the south, nearest the P & ...