Function: noun
Date: 1964
: a luminous celestial object emitting a major portion of its radiation in the form of X-rays ― called also X-ray source
Function: noun
Date: 1964
: a luminous celestial object emitting a major portion of its radiation in the form of X-rays ― called also X-ray source
Merriam Webster Collegiate English Dictionary. Merriam Webster - Энциклопедический словарь английского языка. 2012