01 a. Pertaining to twilight; glimmering; hence, imperfectly clear or luminous.
-
1.
Pertaining to twilight; glimmering; hence, imperfectly clear or luminous.“This semihistorical and crepuscular period.” — Sir G. C. Lewis.
-
2.
Flying in the twilight or evening, or before sunrise; -- said certain birds and insects.(Zool.)“Others feed only in the twilight, as bats and owls, and are called crepuscular.” — Whewell.