diurnal

Definitions:

A journal; a day- book.
- Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874. (noun) (n.) (noun)
Opening during the day only; active in the day- time.
- A dictionary of scientific terms. By Henderson, I. F.; Henderson, W. D. Published 1920. (adjective) (adj.) (adjective)
Daily: relating to or performed in a day.
- The american dictionary of the english language. By Daniel Lyons. Published 1899. (adjective) (adj.) (adjective)
A daybook; a journal.
- Newage Dictionary DB (adjective) (adj.) (adjective)
Pertaining to a day; performed in twenty- four hours; daily.
- The Winston Simplified Dictionary. By William Dodge Lewis, Edgar Arthur Singer. Published 1919. (adjective) (adj.) (adjective)
In the R. C. Church, a breviary with daily services.
- The american dictionary of the english language. By Daniel Lyons. Published 1899. (noun) (n.) (noun)
DIURNALLY.
- The american dictionary of the english language. By Daniel Lyons. Published 1899. (adverb) (adv.) (adverb)
Relating to a day or to the daytime; happening every day; performed in a day; performed in twenty- four hours; applied to diseases whose exacerbations are in the daytime.
- Nuttall's Standard dictionary of the English language. By Nuttall, P.Austin. Published 1914. (adjective) (adj.) (adjective)
Daily.
- The Winston Simplified Dictionary. By William Dodge Lewis, Edgar Arthur Singer. Published 1919. (adjective) (adj.) (adjective)
Pert. to a day; daily; performed in 24 hours.
- Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874. (adjective) (adj.) (adjective)

Usage examples:

The keyhole lodged the earwig and her brood, The emmets of the steps had old possession, And march'd in search of their diurnal food In undisturb'd procession.
- The Poetical Works of Thomas Hood by Thomas Hood
When we study the intelligence of bees we study what is most precious in our own substance, an atom of that extraordinary matter which has the property of transfiguring blind necessity, of organising and multiplying life and making it more beautiful, of checking the obstinate force of death and the great irresponsible wave that rolls round in earth's diurnal course all eternally unconscious things.
- Life and Writings of Maurice Maeterlinck by Jethro Bithell
I discovered a diurnal moth that possessed a most powerful and delicious scent.
- Wanderings Among South Sea Savages And in Borneo and the Philippines by H. Wilfrid Walker