diurnal

1. a. Relating to the daytime; belonging to the period of daylight, distinguished from the night; -- opposed to nocturnal; as, diurnal heat; diurnal hours. Source: opted

2. a. 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. Source: opted

3. a. Opening during the day, and closing at night; -- said of flowers or leaves. Source: opted

4. a. Active by day; -- applied especially to the eagles and hawks among raptorial birds, and to butterflies (Diurna) among insects. Source: opted

5. a. A daybook; a journal. Source: opted

6. a. A small volume containing the daily service for the "little hours," viz., prime, tierce, sext, nones, vespers, and compline. Source: opted

7. a. A diurnal bird or insect. Source: opted

8. adj. of or belonging to or active during the day Source: wordnet

9. adj. having a daily cycle or occurring every day Source: wordnet

10. Opening during the day, and closing at night; -- said offlowers or leaves. Source: adambom

11. j:100 a. of or belonging to or active during the day s. having a daily cycle or occurring every day Source: ecdict

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