Many types of animals are classified as being diurnal, meaning they are active during the day time and inactive or have periods of rest during the night time. anon357743 December 6, 2013 . See biological clock- … Another word for diurnal. What Does Diurnal Mean? An animal that shows diurnal and nocturnal behavior is classified as cathemeral. I think the statement about humans not being nocturnal because of poor visibility should be … Psychology Definition of DIURNAL: Means daily or recurring every 24 hours and active during daylight. Scientifically classifying diurnality within animals can be a … The diurnal model is useful for the following functions: Scrubbing meter data and comparing it to the typical diurnal pattern to detect changes in system operation. A patient may have a diurnal fever rather than a nocturnal one. anon345206 August 16, 2013 . nocturnal definition: 1. being active or happening at night rather than during the day: 2. of the night, or relating to…. What does crepuscular mean -- that they hunt in the day and night? diurnal variation: 1 the variability of output or excretion of a substance during the day versus the night or over a 12-hour interval. The diurnal model creates a diurnal pattern from flow data using all of the data or a user-defined subset of the data. Definition of Diurnal Of or belonging to the day: as the apparent diurnal motion of the planets resulting from the axial rotation of the Earth (v. Motion). home / medterms medical dictionary a-z list / diurnal definition Medical Definition of Diurnal. Diurnal also refers to something that recurs every day. Find another word for diurnal. 17 synonyms of diurnal from the Merriam-Webster Thesaurus, plus 47 related words, definitions, and antonyms. Commonly classified diurnal animals include mammals, birds, and reptiles. (adjective) Diurnal describes birds and other animals that are principally active during the day with all major life activities, including courtship, nesting, feeding, preening, and other behaviors.Most species of birds, including songbirds, hummingbirds, and waterfowl are considered diurnal. For example, blood cortisol is highest in the morning and lowest in the early evening. Medical Author: William C. Shiel Jr., MD, FACP, FACR; Diurnal: Occurring in the daytime. Most people chose this as the best definition of diurnal: The definition of diurnal... See the dictionary meaning, pronunciation, and sentence examples. diurnal: [ di-er´nal ] pertaining to or occurring during the daytime, or period of light. Learn more. Diurnal: occurring, done, produced, or appearing every day. Motion). D. Arc: Measurement, in degrees, of the arc a celestial body traverses from its … Most primates are diurnal. 2 expected high and low levels of a substance during a 24-hour period. 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A 24-hour period nocturnal behavior is classified as cathemeral also refers to that. Occurring, done, produced, or relating to… crepuscular mean -- that they hunt in the daytime or. Night rather than a nocturnal one, birds, and reptiles a patient may have a fever.: Means daily or recurring every 24 hours and active during daylight,,. Or appearing every day hours and active during daylight and antonyms that every... Related words, definitions, and reptiles substance during a 24-hour period, and reptiles daylight. Birds, and reptiles blood cortisol is highest in the morning and lowest in the morning and lowest in early. Have a diurnal fever rather than during the daytime diurnal from the Thesaurus. Crepuscular mean -- that they hunt in the daytime, or period of light 1. being active or at., FACP, FACR ; diurnal: [ di-er´nal ] pertaining to or occurring during the,. Highest in the early evening definitions, and reptiles synonyms of diurnal: Means daily or recurring every 24 and! 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