(physics) the magnetic self-attraction of parallel electric currents having the same direction; the restriction of a flowing plasma because of this attraction

(organic chemistry) A mixture of terpenoid hydrocarbons that is the principal component of essential oils obtained from various species of Pinus; it includes pinene, carene and menthadiene.

a mixture of monoterpene alcohols obtained from various species of Pinus, rich in α-terpineol

The head of a pin. (Frequently used in size comparisons.) / (slang) An ignorant, naive, foolish, or stupid person. / (slang) A telemark skier.

The edible seed of any of several species of evergreen pine, especially Pinus pinea, Pinus cembra, and Pinus cembroides.

(baseball) A substitute runner, usually brought in to replace a slow runner to increase the chance of that runner scoring.

(Scotland) a drink made from boiling beer to which is added nutmeg, eggs, sugar and whiskey; drunk during first footing.

Alternative form of pin-up

(sewing) A device, originally like a small, stuffed cushion, designed to have sewing pins and needles stuck into it to store them safely; some modern pincushions hold the objects magnetically.

(transitive, also figuratively) To jab or stick repeatedly with one or more sharp objects, as with pins into a pincushion.