PETROLEUM n.
line, paraffin, etc. Petroleum spirit, a volatile liquid obtained in the distillation of crude petroleum at a temperature of 170° Fahr., or below. The term is rather loosely applied to a considerable range of products, including benzine and ligroin. The terms petroleum ether, and naphtha, are sometimes applied to the s…
PILOT n.
a ship, on account of which sailors imagine that it acts as a pilot to the shark. (b) The rudder fish (Seriola zonata). -- Pilot jack, a flag or signal hoisted by a vessel for a pilot. -- Pilot jacket, a pea jacket. -- Pilot nut (Bridge Building), a conical nut applied temporarily to the threaded end of a pin, to pr…
PISTIL n.
The seed-bearing organ of a flower. It consists of an ovary, containing the ovules or rudimentary seeds, and a stigma, which is commonly raised on an elongated portion called a style. When composed of one carpel a pistil is simple; when composed of several, it is compound. See Illust. of Flower, and Ovary.…