WordReference Random House Unabridged Dictionary of American English © 2026
Sey′fert gal′axy
(sī′fərt, sē′-),USA pronunciation [Astron.]
- Astronomyone of a group of spiral galaxies with compact, bright nuclei having characteristically broad emission lines suggestive of very hot gases in violent motion at the center.
- named after Carl K. Seyfert (1911–60), American astronomer, who first described them 1965–70
'Seyfert galaxy' also found in these entries (note: many are not synonyms or translations):