PLUG n.
stead of a point, so as to follow and enlarge a hole previously made, or to form a counterbore around it. -- Plug rod (Steam Eng.) , a rod attached to the beam for working the valves, as in the Cornish engine. -- Plug valve (Mech.), a tapering valve, which turns in a case like the plug of a faucet.
POLAR a.
probably a variety of the common European hare (L. timidus). -- Polar lights, the aurora borealis or australis. -- Polar, or Polaric, opposition or contrast (Logic), an opposition or contrast made by the existence of two opposite conceptions which are the extremes in a species, as white and black in colors; hence, as…
ROCK n. 2 definitions
abs of the genus Cancer, as the two species of the New England coast (C. irroratus and C. borealis). See Illust. under Cancer. -- Rock cress (Bot.), a name of several plants of the cress kind found on rocks, as Arabis petræa, A. lyrata, etc. -- Rock crystal (Min.), limpid quartz. See Quartz, and under Crystal. -- Ro…
ROUSTABOUT n.
A laborer, especially a deck hand, on a river steamboat, who moves the cargo, loads and unloads wood, and the like; in an opprobrious sense, a shiftless vagrant who lives by chance jobs. [Western U.S.]