BAROMETER n.
tube contracted at bottom to prevent rapid oscillations of the mercury, and suspended in gimbals from an arm or support on shipboard. -- Mountain barometer, a portable mercurial barometer with tripod support, and long scale, for measuring heights. -- Siphon barometer, a barometer having a tube bent like a hook with…
BORE v. 2 definitions
To perforate or penetrate, as a solid body, by turning an auger, gimlet, drill, or other instrument; to make a round hole in or through; to pierce; as, to bore a plank. I'll believe as soon this whole earth may be bored. Shak.
COMPASS n.
ints, called also rhumbs, and the glass-covered box or bowl containing it is suspended in gimbals within the binnacle, in order to preserve its horizontal position. -- Surveyor's compass, an instrument used in surveying for measuring horizontal angles. See Circumferentor. -- Variation compass, a compass of delicate c…