light

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light[1,noun] light[2,adjective] Cerenkov radiation light adaptation light chain light flux light guide light-headedness light microscope light sensitization light therapy luminous flux polymorphic light eruption polymorphous light eruption pulsed light ultraviolet light white light Wood's light

Main Entry: ¹light
Pronunciation: lt
Function: noun
1 a : the sensation aroused by stimulation of the visual receptors b : an electromagnetic radiation in the wavelength range including infrared, visible, ultraviolet, and X-rays and traveling in a vacuum with a speed of about 186,281 miles (300,000 kilometers) per second; specifically : the part of this range that is visible to the human eye
2 : a source of light