n. A relatively wide, often flaring and curved, illuminated tail composed of dust that is forced away from a comet's nucleus by solar radiation pressure.
dust tail
dust tail
See comet tails.
dust tail
[′dəst ‚tāl] (astronomy) A comet tail that consists of particles, typically 1 micrometer in diameter and primarily silicate in composition, and is usually curved with a length in the range from 106 to 107 kilometers.MedicalSeeCOMETThesaurusSeecomet