(a.) Relating to the daytime; belonging to the period of daylight, distinguished from the night; -- opposed to nocturnal; as, diurnal heat; diurnal hours.
(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.
(a.) Opening during the day, and closing at night; -- said of flowers or leaves.
(a.) Active by day; -- applied especially to the eagles and hawks among raptorial birds, and to butterflies (Diurna) among insects.
(a.) A daybook; a journal.
(a.) A small volume containing the daily service for the "little hours," viz., prime, tierce, sext, nones, vespers, and compline.
(a.) A diurnal bird or insect.
Example Sentences:
(1) Four of 18 patients showed no change over the twenty-four hours while 7 patients showed some variation without definite diurnal pattern.
(2) The amount of EB or progesterone injected seemed unimportant but, in either case, had to be given within a limited diurnal period of sensitivity.
(3) Seven days of constant light, however, reverses this diurnal variation such that plasma prolactin levels peak at 11:30 AM and reach a nadir at approximately 11:30 PM.
(4) Study of the clinical characteristics of depressive state by hemisphere stroke with the use of symptom items of Zung scale and Hamilton scale showed that patients in depressive state with right hemisphere stroke had high values in symptom items considered close to the essence of endogenous depression such as depressed mood, suicide, diurnal variation, loss of weight, and paranoid symptoms, while patients in depressive state with left hemisphere stroke had high values in symptom items having a nuance of so-called neurotic depression such as psychic anxiety, hypochondriasis, and fatigue.
(5) Intraocular pressure was investigated with multiple 12-hour diurnal curves.
(6) The purpose of this study was to examine the pattern of diurnal variation of blood pressure in normotensive working women, and to assess the effect of work stress on this pattern.
(7) In order to clarify the diurnal pattern of secretion of plasma immunoreactive (IR) proopiomelanocortin (POMC)-derived peptides, IR-N-terminal peptide (Nt), IR-beta-endorphin (Ep), IR-beta-lipotropin (LPH), and IR-ACTH (ACTH) in normal subjects and in patients with Addison's disease and Cushing's disease, we measured these 4 peptides in the same plasma obtained at 0900 h and then every three hours until 0600 h at the next day.
(8) When administered to adult patients with urge incontinence (generally as a 25mg twice-daily dose) terodiline reduces diurnal and nocturnal micturition frequency and incontinence episodes.
(9) These findings would suggest that hereditary progressive dystonia with marked diurnal fluctuation could show not only a diurnal fluctuation but also age-dependent changes of symptoms.
(10) The diurnal rhythms of sleep-wake activity, motor activity, and Tbr were not affected in rats.
(11) No IgE circadian rhythm was validated in healthy children while a large amplitude (approximately equal to 30% of the 24 hours mean) circadian rhythm with 2 diurnal peaks and a nocturnal trough was demonstrated (P less than 0.0023) in the asthmatics.
(12) The degree of change was comparable during the diurnal and nocturnal periods.
(13) A diurnal pattern, however, could not be shown in the corticosterone response to immobilization.
(14) In one rat studied 30 days after ocular enucleation the diurnal rhythm in synthesis persisted; however, relative to 4 days after enucleation the phase of the rhythm shifted about 90 degrees suggesting that light deprivation caused the rhythm to become free-running with a period slightly different from 24 h.
(15) It has a relatively short half-life, and large diurnal fluctuations in serum concentrations occur, thus making it difficult to define clear relationships between individual serum concentrations and either therapeutic or adverse effects.
(16) Vocalizations exhibited diurnal peaks of occurrence (0600-0800, 1600-1800 h).
(17) The syndrome of obstructive sleep apnoea is associated with an increased morbidity (the consequence of diurnal hypersomnolence and cardiovascular complications).
(18) 1) Diurnal patterns of the above-mentioned items were recorded, mutual relationships relationships between these items were revealed.
(19) Plasma and IL peptide levels were relatively constant during daylight hours (0600-1800 h), but increased after the onset of darkness and reached maximal concentrations at 0200 h. To examine the possibility that this diurnal rhythm in the content and secretion of POMC-derived peptides resulted from diurnal changes in the biosynthesis of POMC, the concentration and rate of synthesis of POMC mRNA were examined.
(20) The diurnal variation of [125I]iodomelatonin binding sites in the brain and serum melatonin levels were studied at 4-hour intervals under a 12 h:12 h light:dark cycle in 5-week-old chicks.
Once
Definition:
(adv.) By limitation to the number one; for one time; not twice nor any number of times more than one.
(adv.) At some one period of time; -- used indefinitely.
(adv.) At any one time; -- often nearly equivalent to ever, if ever, or whenever; as, once kindled, it may not be quenched.