Origin of diurnal
Related Words for diurnaldurable, perpetual, long-lasting, enduring, stable, regularly, often, periodic, constantly, regular, routine, everyday, day-to-day, invariable, set, everlasting, perennial, ordinary, commonplace, common
Examples from the Web for diurnal
Historical Examples of diurnal
Diurnal: such insects as are active or habitually fly by day only.Explanation of Terms Used in Entomology
John. B. Smith
All were at a good height, and the whole movement had the air of a diurnal migration.The Foot-path Way
From the owls to the diurnal birds of prey it is but a short step.Birds of the Indian Hills
She avoided the house, but sent a woman for her diurnal love letters.A Simpleton
The wallet of diurnal anecdote was full, and craved unloading.The Disowned, Complete
Word Origin for diurnal
late 14c., from Late Latin diurnalis "daily," from Latin dies "day" + -urnus, an adjectival suffix denoting time (cf. hibernus "wintery"). Dies "day" is from PIE root *dyeu- "to shine" (cf. Sanskrit diva "by day," Welsh diw, Breton deiz "day;" Armenian tiw; Lithuanian diena; Old Church Slavonic dini, Polish dzień, Russian den), literally "to shine" (cf. Greek delos "clear;" Latin deus, Sanskrit deva "god," literally "shining one;" Avestan dava- "spirit, demon;" Lithuanian devas, Old Norse tivar "gods;" Old English Tig, genitive Tiwes, see Tuesday).
- Occurring once in a 24-hour period; daily.
- Having a 24-hour cycle. The movement of stars and other celestial objects across the sky are diurnal.