adjective
relating to or like the time of day just before the sun goes down, when the light is not bright
(of animals) active or appearing at the time of day just before the sun goes down, or just after the sun rises, when the light is not bright:
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Deer are crepuscular, meaning that they are most active at dawn and at dusk.adjective
related to the period of the evening when the sun has just gone down but there is still some light in the sky
adjective
of, relating to, or resembling twilight : dim
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crepuscular light-
the crepuscular skyoccurring or active during twilight
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crepuscular insects-
crepuscular activity-
crepuscular birds