PETROLEUM n.
tillation 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 still more volatile products, including rhigolene, gasoline, cymogene, etc.…
PETTICOAT n.
A loose under-garment worn by women, and covering the body below the waist. Petticoat government, government by women, whether in politics or domestic affairs. [Colloq.] -- Petticoat pipe (Locomotives), a short, flaring pipe surrounding the blast nozzle in the smoke box, to equalize the draft.
PLASTER n.
ter a paste which soon sets or hardens, and is used for casts, moldings, etc. The term is loosely applied to any plaster stone or species of gypsum. -- Plaster of Paris bandage (Surg.), a bandage saturated with a paste of plaster of Paris, which on drying forms a perfectly fitting splint. -- Plaster stone, any specie…
PORPHYRY n.
A term used somewhat loosely to designate a rock consisting of a fine-grained base (usually feldspathic) through which crystals, as of feldspar or quartz, are disseminated. There are red, purple, and green varieties, which are highly esteemed as marbles. Porphyry shell (Zoöl.), a handsome marine gastropod shell (Oliva…