zodiacal-light

zodiacal light

noun
a luminous tract in the sky, seen in the west after sunset or in the east before sunrise and thought to be the light reflected from a cloud of meteoric matter revolving round the sun.

Origin:
1725–35

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
zodiacal light
 
n
a very faint cone of light in the sky, visible in the east just before sunrise and in the west just after sunset. It is probably due to the reflection of sunlight from cosmic dust in the plane of the ecliptic

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
zodiacal light   (zō-dī'ə-kəl)  Pronunciation Key 
A faint hazy cone of light, often visible in the west just after sunset or in the east just before sunrise, and elongated in the direction of the ecliptic on each side of the Sun. It is apparently caused by the reflection of sunlight from meteoric particles in the plane of the ecliptic.
The American Heritage® Science Dictionary
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