Diurnal

·adj A daybook; a journal.

II. Diurnal ·adj A diurnal bird or insect.

III. Diurnal ·adj Opening during the day, and closing at night;

— said of flowers or leaves.

IV. Diurnal ·adj A small volume containing the daily service for the "little hours," viz., prime, tierce, sext, nones, vespers, and compline.

V. Diurnal ·adj Active by day;

— applied especially to the eagles and hawks among raptorial birds, and to butterflies (Diurna) among insects.

VI. Diurnal ·adj Relating to the daytime; belonging to the period of daylight, distinguished from the night;

— opposed to nocturnal; as, diurnal heat; diurnal hours.

VII. Diurnal ·adj 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.