Arc-jet engine
a type of rocket engine using propellant gas heated by an electric arc.
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- Arc lamp
also, arc lamp. a lamp in which the light source is a high-intensity electric arc either between carbon rods in air or between metal electrodes in a xenon gas atmosphere enclosed in a quartz bulb. the light produced by such a lamp. historical examples an arc lamp operated in this way is called an enclosed […]
- Arc of lowitz
a halo or arc of light, occurring infrequently, which extends diagonally downward from a 22° parhelion.
- Arc sec
. arc secant
- Arc secant
the angle, measured in radians, that has a secant equal to a given number. symbol: sec −1. abbreviation: arc sec; arc secant the inverse of the secant function.
- Arc second
astronomy, 2 (def 4).