Occurring in the daytime. A patient may have a diurnal fever rather than a nocturnal one. Diurnal also refers to something that recurs every day.

[L. diurnus, of the day] Applied to organisms that are active during the daylight hours.

Daily, especially pertaining to cyclic actions which are completed within 24 hours, and which recur every 24 hours, such as temperature, relative humidity and wind. 

Daily; related to actions which are completed in the course of a calendar day, and which typically recur every calendar day (e.g., diurnal temperature rises during the day, and diurnal falls at night) [..]

late 14c., from Late Latin diurnalis "daily," from Latin dies "day" + -urnus, an adjectival suffix denoting time (compare hibernus "wintery"). Dies "day" is fro [..]

active during the day.

Occuring during the day.

A daylily is described as diurnal if its blossoms open in early morning or during the day. Early-morning opening is a desirable attribute of a daylily hybrid.

Organism that is active during the day

active by day.

adj. Daily.

in geography, daily, or of each day, where a day means the full 24 hour period.

diurnal animals are those that are active during the day. Read more on: Diurnal

An animal who is active during the day and sleeps at night. © 2010 by Nature Education Knowledge.

Pertaining to daily cycles or events.An animal with an activity period during the light portion of the daily cycle. diurnal tide

Means daily or recurring every 24 hours and active during daylight. See biological clock- circadian rhythm. Compare nocturnal.

daytime (pop)

of flowers, opening only during daylight hours. cf. nocturnal.

— In astronomy, diurnal generally refers to the motion of an object in a 24 hour period. An example would be Moon-rise. These activities repeat every 24 hours. The diurnal arc describes the a [..]

(L: dies=day) (of animals): active by day. (of plants): altering condition between day and night. See nocturnal.

(adj) - daily

Active during the light periods of the daily cycle. Compare nocturnal.

used here to describe animals that are active during the daytime rather than at night.

active in the daytime; occurring during the day.

(adj) having a daily cycle or occurring every day(adj) of or belonging to or active during the day

of or during the day.

active during the day, 2. lasting for one day.

Awake and active during the day, asleep at night.

Diurnal means occurring in the day.

Having a daily cycle or pattern. It may be useful to average many daily cycles of wind speed or wind energy production to understand a typical daily pattern, by month, season, or year.

Having a period or cycle of approximately one tidal day. Thus, the tide is said to be diurnal when only one high water and one low water occur during a tidal day, and the tidal current is said to be d [..]

Daily. Occurring once a day.

Daily; occurring once a day.

having a period of, occurring in, or related to once a day

Daily; occurring once a day.

Performed in twenty-four hours, such as the diurnal rotation of the Earth.

Usually active during daylight hours.

Active during the day.

Animals that are active during the day.

active at daytime

  Most active during the daytime.  For example, most butterflies are diurnal as they fly during the day and rest at night. Entomologist:

Active during the day.

 active during daylight. Unlike butterflies, which are diurnal, most moths are active at night and referred to as nocturnal. A few moth species are strictly diurnal and have adaptations to daytime fli [..]

active during the day

The habit of becoming active during daylight hours.

most active during the day. Opposite of nocturnal

active during the day time

An insect that is active in the daytime, eg, a day-flying Moth.

An animal that is active during daylight.

A single daily cycle.

referring to daily phenomena.

Daily; related to actions which are completed in the course of a calendar day, and which typically recur every calendar day (e.g., diurnal temperature rises during the day, and diurnal falls at night).

daily, or the daily cycle. A diurnal plot is usually a representative midnight-to-midnight graph of values measured at a smaller time interval (e.g., hourly or 5-minute values). DOE

adj. "diurnal, daily," s.v. diurnal a. and sb. OED. KEY: diurnal@adj

adj 1 diurnal 1

Having a period or cycle of approximately 1 day. The tide is said to be diurnal when only one high water and one low water occur during a tidal day, and the tidal current is said to be diurnal when th [..]

Daily, especially pertaining to a cycle completed within a 24-hour period, and which recurs every 24 hours.

Daily; related to actions which are completed in the course of a calendar day, and which typically recur every calendar day (e.g., diurnal temperature rises during the day, and diurnal falls at night).

Active by day.

during the daytime. The diurnal resting places of mosquitoes, especially newly-fed females, may be important in malaria control. EIR

Daily; related to actions which are completed in the course of a calendar day, and which typically recur every calendar day (e.g., diurnal temperature rises during the day, and diurnal falls at night).

Daily occurrence; related to actions which are completed in the course of a calendar day, and which typically recur every calendar day (e.g., diurnal temperature rises during the day, and diurnal falls at night).

Daily; related to actions which are completed in the course of a calendar day, and which typically recur every calendar day (e.g., diurnal temperature rises during the day, and diurnal falls at night) [..]

Daily; related to actions which are completed in the course of a calendar day, and which typically recur every calendar day (e.g., diurnal temperature

An animal that is active during the daytime and rests during the night.

Pertaining to actions or events that occur during a twenty-four hour cycle or recurs every twenty-four hours. Meteorological elements that are measured diurnally include clouds, precipitation, pressure, relative humidity, temperature, and wind.

Daily; related to actions which are completed in the course of a calendar day, and which typically recur every calendar day (e.g., diurnal temperature rises during the day, and diurnal falls at night) [..]

Pertaining to actions or events that occur during a twenty-four hour cycle or recurs every twenty-four hours. Meteorological elements that are measured diurnally include clouds, precipitation, pressur [..]

Pertaining to actions or events that occur during a twenty-four hour cycle or recurs every twenty-four hours. Meteorological

Daily; related to actions which are completed in the course of a calendar day, and which typically recur every calendar day (e.g., diurnal temperature rises during the day, and diurnal falls at night) [..]

Pertaining to actions or events that occur during a twenty-four hour cycle or recurs every twenty-four hours. Meteorological elements that are measured diurnally include clouds, precipitation, pressure, relative humidity, temperature, and wind.

recurring daily, or in the daytime. See also biorhythm, circadian, ultradian; menstrual.