noun which may take the genitive case particle 'no'
crepuscular
Biology term describing animals active primarily during twilight (dawn and dusk).
Cats are said to be crepuscular animals.
Crepuscular species have activity patterns distinct from both nocturnal and diurnal ones.
Nocturnal; active at night, as opposed to twilight.
Diurnal; active during the day.
Compound of 薄明 (twilight, dawn) + 薄暮 (dusk, twilight) + 性 (nature, -ity). The exact derivation is uncertain, but it is a modern technical coinage in biology.