arc' light"

1. 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.
2. the light produced by such a lamp. Cf. carbon arc, xenon arc.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

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