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

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

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

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..

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..

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

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..

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

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..

Semidiurnal :: Semidiurnal (a.) Pertaining to, or accomplished in, half a day, or twelve hours; occurring twice every day..

Journal :: Journal (a.) Daily; diurnal.

Ephemeral :: Ephemeral (a.) Beginning and ending in a day; existing only, or no longer than, a day; diurnal; as, an ephemeral flower..

Diurnalist :: Diurnalist (n.) A journalist.

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..

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

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

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..

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

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