diurnal

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Adjective diurnal has 2 senses

diurnal - belonging to or active during the day; "diurnal animals are active during the day"; "diurnal flowers are open during the day and closed at night"
Antonym: nocturnal
diurnal - having a daily cycle or occurring every day; "diurnal rhythms"; "diurnal rotation of the heavens"; "the diurnal slumber of bats"
Antonyms: noncyclic, noncyclical (indirect, via cyclic)

ditzy diu-mian-zi diurectic diuresis diuretic diuretic drug diuretics diuril diurnal diurnal month diurnal parallax diurnal variation diuron diutan diva divagate divagation

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