Main Entry: Sey·fert galaxy

Pronunciation: \ˈsē-fərt- also ˈsī-\

Function: noun

Etymology: Carl K. Seyfert †1960 American astronomer

Date: 1959

: any of a class of spiral galaxies that have small compact bright nuclei characterized by variability in light intensity, emission of radio waves, and spectra —called also Seyfert