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Diurnalness :: Diurnalness (n.) The quality of being diurnal.

Diurna :: Diurna (n. pl.) A division of Lepidoptera, including the butterflies; -- so called because they fly only in the daytime..

Equidiurnal :: Equidiurnal (a.) Pertaining to the time of equal day and night; -- applied to the equinoctial line.

Nocturnal :: Nocturnal (a.) Of, pertaining to, done or occuring in, the night; as, nocturnal darkness, cries, expedition, etc.; -- opposed to diurnal..

Diurnation :: Diurnation (n.) Continuance during the day.

Semidiurnal :: Semidiurnal (a.) Pertaining to, or traversed in, six hours, or in half the time between the rising and setting of a heavenly body; as, a semidiurnal arc..

Arc :: Arc (n.) The apparent arc described, above or below the horizon, by the sun or other celestial body. The diurnal arc is described during the daytime, the nocturnal arc during the night..

Diurnal :: Diurnal (a.) A small volume containing the daily service for the little hours, viz., prime, tierce, sext, nones, vespers, and compline..

Urania :: Urania (n.) A genus of large, brilliantly colored moths native of the West Indies and South America. Their bright colored and tailed hind wings and their diurnal flight cause them to closely resemble butterflies..

Low :: Low (adv.) In a path near the equator, so that the declination is small, or near the horizon, so that the altitude is small; -- said of the heavenly bodies with reference to the diurnal revolution; as, the moon runs low, that is, is comparatively near the horizon when on or near the meridian..

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

Diurnal :: Diurnal (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..

Butterfly :: Butterfly (n.) A general name for the numerous species of diurnal Lepidoptera.

Heliostat :: Heliostat (n.) An instrument consisting of a mirror moved by clockwork, by which a sunbeam is made apparently stationary, by being steadily directed to one spot during the whole of its diurnal period; also, a geodetic heliotrope..

Diurnal :: Diurnal (a.) A diurnal bird or insect.

Diurnal :: Diurnal (a.) Relating to the daytime; belonging to the period of daylight, distinguished from the night; -- opposed to nocturnal; as, diurnal heat; diurnal hours..

Flood :: Flood (v. i.) The flowing in of the tide; the semidiurnal swell or rise of water in the ocean; -- opposed to ebb; as, young flood; high flood..

Meridian :: Meridian (a.) Being at, or pertaining to, midday; belonging to, or passing through, the highest point attained by the sun in his diurnal course..

Diurnal :: Diurnal (a.) A daybook; a journal.

Daily :: Daily (a.) Happening, or belonging to, each successive day; diurnal; as, daily labor; a daily bulletin..

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