crepuscular

The definition of crepuscular is dim, or active during the twilight hours.

(adjective)

An example of something crepuscular is a room with little light.

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See crepuscular in Webster's New World College Dictionary

adjective

  1. of or like twilight; dim
  2. active at twilight or just before sunrise: crepuscular insects

Origin: see crepuscule

See crepuscular in American Heritage Dictionary 4

adjective
  1. Of or like twilight; dim: “the period's crepuscular charm and a waning of the intense francophilia that used to shape the art market” (Wall Street Journal).
  2. Zoology Becoming active at twilight or before sunrise, as do bats and certain insects and birds.

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