star trail

noun

: a continuous line produced on a photographic plate by the image of a star during an exposure in which the camera or telescope does not follow the diurnal motion of the star or follows the motion of some other celestial body (such as a comet) that is being photographed

The Ultimate Dictionary Awaits

Expand your vocabulary and dive deeper into language with Merriam-Webster Unabridged.

1. Expanded definitions
2. Detailed etymologies
3. Advanced search tools
4. All ad-free

Discover what makes Merriam-Webster Unabridged the essential choice for true word lovers.

Start Your Free Trial Now