luminal

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Synonyms: liminal, lumenal, fluminal, luminar, numinal, ruminal, luminol, laminal, lumina

Antonyms: liminal, lumenal, fluminal, luminar, numinal, ruminal, luminol, laminal, lumina

Related words from Datamuse; suggestions, not definitions.

Adjective

1. Of or pertaining to the lumen.
2. of or pertaining to the nature of light.
3. Light-speed; having the speed of light (usually in the void).

Noun

1. The drug phenobarbital.

Source: Wiktionary · CC BY-SA 3.0 (Wiktionary) · cached copy, not a rewrite.