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ULX

Abbreviation of ultra-luminous X-ray (the individual X-rays are not ultraluminous).

RareScrabble 10

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Meanings

adjectiveULX (not comparable)

abbreviationnot comparableastronomyAbbreviation of ultra-luminous X-ray (the individual X-rays are not ultraluminous).

nounULX (plural ULXs or ULX's)

plural ULXs · plural ULX's

abbreviationellipsisastronomyEllipsis of ultraluminous X-ray pulsar (“ULX pulsar”).
abbreviationellipsisastronomyEllipsis of ultraluminous X-ray source (“ULX source”).

Rhymes & wordplay

Rhymes with ULX

x sex complex ex specs annex tex flex rex hex xxxx lex bx codex CSX vex transsex perplex Jex prex kex intertex Clex cryptex

Anagrams

Cite this entry

APA

ULX. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/ULX

MLA

“ULX.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/ULX. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “ULX,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/ULX.

Source: ULX on Wiktionary, CC BY-SA 4.0.