| PN, P/N or pn | |
| —abbreviation for | |
| promissory note | |
| P/N, P/N or pn | |
| —abbreviation for | |
| pn, P/N or pn | |
| —abbreviation for | |
| an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle. |
| a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison. |
P/N
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