crepuscular
/krɪˈpʌskjʊlər/
adjective
Origin
Latin
crepusculum — twilight, dusk
Overview
Meaning Now
- Relating to, resembling, or occurring in the twilight.
- Active during the twilight periods of dawn and dusk (referring to animals).
Literal older meaning
dim, dusky
Language path
Latin → English
Earliest form
crepuscular
Earliest period
17th century
Journey
The term derives from the Roman concept of the time between day and night, where light was considered 'uncertain' or 'dusky'. In biological contexts, it distinguishes animals active during transition periods from diurnal (day) and nocturnal (night) creatures, often as an evolutionary strategy to avoid predators or avoid the heat of the midday sun.
Evolution
- Latin
creper
“dark, obscure, uncertain”
The underlying root associated with the concept of gloom.
- Latin
crepusculum
“twilight”
Derived from creper with the suffix -culum.
- English
crepuscular
“of or relating to twilight”
Adopted into scientific and literary English.
Connections
Word parts
crepuscul-
root
twilight
-ar
suffix
relating to
Related across languages
French
crépusculaire
crepuscular
Spanish
crepuscular
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Related to crepuscular
External references use DefinedTerm semantics.