CREPUSCULAR

{ Cre‐pus″cu‐lar (–k?–l?r), Cre‐pus″cu‐lous (–l?s), } a. [[Cf. F. crépusculaire.]] 1. 1. Pertaining to twilight; glimmering; hence, imperfectly clear or luminous.
This semihistorical and crepuscular period. Sir G. C. Lewis. 2. 2. (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. Whewell.