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Luminal

adj, noun

Definitions

Adjective
  1. 1
    of or pertaining to the lumen not-comparable
  2. 2
    of or pertaining to the nature of light not-comparable
  3. 3
    light-speed; having the speed of light (usually in the void) not-comparable
Noun
  1. 1
    The drug phenobarbital. uncountable
  2. 2
    a long-acting barbiturate used as a sedative wordnet

Etymology

Etymology 1

From Latin lumina (“lights”) + -al.

Etymology 2

From the brand name.

See also for "luminal"

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