ULX noun 2adjective 1forms 2 noun2 •Ellipsis of ultraluminous X-ray pulsar (“ULX pulsar”). •Ellipsis of ultraluminous X-ray source (“ULX source”). adjective1 •Abbreviation of ultra-luminous X-ray (the individual X-rays are not ultraluminous). formsULX's · ULXs
