ˈhertˌspru̇ŋˈrəs ə l- noun
Usage: usually capitalized H&R
Etymology: after Ejnar Hertzsprung died 1967 Dan. astronomer and Henry Norris Russell died 1957 American astrophysicist
: spectrum-luminosity diagram
ˈhertˌspru̇ŋˈrəs ə l- noun
Usage: usually capitalized H&R
Etymology: after Ejnar Hertzsprung died 1967 Dan. astronomer and Henry Norris Russell died 1957 American astrophysicist
: spectrum-luminosity diagram
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012