1. diurnal - Noun
2. diurnal - Adjective
3. diurnal - Adjective Satellite
Relating to the daytime; belonging to the period of daylight, distinguished from the night; -- opposed to nocturnal; as, diurnal heat; diurnal hours.
Daily; recurring every day; performed in a day; going through its changes in a day; constituting the measure of a day; as, a diurnal fever; a diurnal task; diurnal aberration, or diurnal parallax; the diurnal revolution of the earth.
Opening during the day, and closing at night; -- said of flowers or leaves.
Active by day; -- applied especially to the eagles and hawks among raptorial birds, and to butterflies (Diurna) among insects.
A daybook; a journal.
A small volume containing the daily service for the "little hours," viz., prime, tierce, sext, nones, vespers, and compline.
A diurnal bird or insect.
Source: Webster's dictionaryA slumber did my spirit seal; I had no human fears; She seemed a thing that could not feel; The touch of earthly years. No motion has she now, no force; She neither hears nor sees; Rolled round in earth's diurnal course. . . William Wordsworth
No motion has she now, no force; She neither hears nor sees; Rolled around in earth's diurnal course, With rocks, and stones, and trees. William Wordsworth
diurnal animals are active during the day Source: Internet
diurnal flowers are open during the day and closed at night Source: Internet
diurnal and nocturnal offices Source: Internet
diurnal rotation of the heavens Source: Internet