cosmic dust


noun Astronomy.

fine particles of matter in space.

Origin of cosmic dust

First recorded in 1880–85
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for cosmic dust

cosmic dust


noun

fine particles of solid matter occurring throughout interstellar space and often collecting into clouds of extremely low densitySee also nebula (def. 1)
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