PATCH n.
, ice in overlapping pieces in the sea. -- Soft patch, a patch for covering a crack in a metallic vessel, as a steam boiler, consisting of soft material, as putty, covered and held in place by a plate bolted or riveted fast.
PHOSPHORUS n. 2 definitions
A poisonous nonmetallic element of the nitrogen group, obtained as a white, or yellowish, translucent waxy substance, having a characteristic disagreeable smell. It is very active chemically, must be preserved under water, and unites with oxygen even at ordinary temperatures, giving a faint glow, -- whence its name. It…
PITCH n.
tch circle in inches; as, 4 pitch, 8 pitch, etc. -- Pitch chain, a chain, as one made of metallic plates, adapted for working with a sprocket wheel. -- Pitch line, or Pitch circle (Gearing), an ideal line, in a toothed gear or rack, bearing such a relation to a corresponding line in another gear, with which the forme…
PLATINUM n.
A metallic element, intermediate in value between silver and gold, occurring native or alloyed with other metals, also as the platinum arsenide (sperrylite). It is heavy tin-white metal which is ductile and malleable, but very infusible, and characterized by its resistance to strong chemical reagents. It is used for cr…
POSITIVE a.
Hence, basic; metallic; not acid; -- opposed to negative, and said of metals, bases, and basic radicals. Positive crystals (Opt.), a doubly refracting crystal in which the index of refraction for the extraordinary ray is greater than for the ordinary ray, and the former is refracted nearer to the axis than the latter,…
PROCESS n.
ric acid gas over heated slag which has been previously saturated with a solution of some metallic salt, as sulphate of copper. -- Final process (Practice), a writ of execution in an action at law. Burrill. -- In process, in the condition of advance, accomplishment, transaction, or the like; begun, and not completed.…