Symbiotic binaries
Symbiotic stars
A stellar object whose optical spectrum displays lines characteristic of gases of two very different temperatures, typically of an M star (3500 K) and a B star (20 000 K) superimposed. A symbiotic star is in fact a close binary system.
Symbiotic binary stars
Emission line stars
Z Andromedae stars
Symbiotic novae
Interacting binary stars