• Webster's Revised Unabridged Dictionary
    • Crepusculous (Zoöl) Flying in the twilight or evening, or before sunrise; -- said certain birds and insects. "Others feed only in the twilight, as bats and owls, and are called crepuscular ."
    • Crepusculous Pertaining to twilight; glimmering; hence, imperfectly clear or luminous. "This semihistorical and crepuscular period."
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Century Dictionary and Cyclopedia
    • crepusculous Pertaining to twilight; glimmering; imperfectly clear or luminous.
    • ***


Webster's Revised Unabridged Dictionary
Cf. F. crépusculaire,


In literature:

Associated Words: crepuscular, crepusculous.
"Putnam's Word Book" by Louis A. Flemming