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diurnal 音标拼音: [dɑɪ'ɚnəl] a. 每日的,一日间的,白天的 每日的,一日间的,白天的 diurnal adj 1: of or belonging to or active during the day; " diurnal animals are active during the day"; " diurnal flowers are open during the day and closed at night"; " diurnal and nocturnal offices" [ ant: { nocturnal}] 2: having a daily cycle or occurring every day; " diurnal rotation of the heavens" Diurnal \ Di* ur" nal\, n. [ Cf. F. diurnal a prayerbook. See { Diurnal}, a.] 1. A daybook; a journal. [ Obs.] -- Tatler. [ 1913 Webster] 2. ( R. C. Ch.) A small volume containing the daily service for the " little hours," viz., prime, tierce, sext, nones, vespers, and compline. [ 1913 Webster] 3. ( Zool.) A diurnal bird or insect. [ 1913 Webster]
Diurnal \ Di* ur" nal\, a. [ L. diurnalis, fr. dies day. See { Deity}, and cf. { Journal}.] 1. Relating to the daytime; belonging to the period of daylight, distinguished from the night; -- opposed to { nocturnal}; as, diurnal heat; diurnal hours. [ 1913 Webster] 2. 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. [ 1913 Webster] Ere twice the horses of the sun shall bring Their fiery torcher his diurnal ring. -- Shak. [ 1913 Webster] 3. ( Bot.) Opening during the day, and closing at night; -- said of flowers or leaves. [ 1913 Webster] 4. ( Zool.) Active by day; -- applied especially to the eagles and hawks among raptorial birds, and to butterflies ( Diurna) among insects. [ 1913 Webster] { Diurnal aberration} ( Anat.), the aberration of light arising from the effect of the earth' s rotation upon the apparent direction of motion of light. { Diurnal arc}, the arc described by the sun during the daytime or while above the horizon; hence, the arc described by the moon or a star from rising to setting. { Diurnal circle}, the apparent circle described by a celestial body in consequence of the earth' s rotation. { Diurnal motion of the earth}, the motion of the earth upon its axis which is described in twenty- four hours. { Diurnal motion of a heavenly body}, that apparent motion of the heavenly body which is due to the earth' s diurnal motion. { Diurnal parallax}. See under { Parallax}. { Diurnal revolution of a planet}, the motion of the planet upon its own axis which constitutes one complete revolution. Syn: See { Daily}. [ 1913 Webster] 33 Moby Thesaurus words for " diurnal": annual, biannual, biennial, bimonthly, biweekly, catamenial, centenary, centennial, circadian, daily, daytime, decennial, everyday, fortnightly, hebdomadal, hourly, menstrual, momentary, momently, monthly, quarterly, quotidian, regular, secular, semestral, semiannual, semimonthly, semiweekly, semiyearly, tertian, triennial, weekly, yearly
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