Diurnality is a form of plant and animal behavior characterized by activity during daytime, with a period of sleeping or other inactivity at night. The common adjective used for daytime activity is " diurnal ".

The meaning of DIURNAL is active chiefly in the daytime. How to use diurnal in a sentence.

DIURNAL definition: 1. being active or happening during the day rather than at night: 2. happening over a period of a…. Learn more.

Look up diurnal in Wiktionary, the free dictionary. Diurnal ("daily") may refer to:

4 meanings: 1. happening during the day or daily 2. (of flowers) open during the day and closed at night 3. (of animals) active.... Click for more definitions.

2025年1月2日 · Happening or occurring during daylight, or primarily active during that time. Most birds are diurnal. However, in general, lizards are more diurnal than rattlers, which may be one of the reasons why young rattlers are more diurnal than adults.

The adjective diurnal can be used to describe anything that takes place in the daytime, but it is most often used in the field of biology to describe animals that are active during the day and then sleep at night.

Occurring once in a 24-hour period; daily. Having a 24-hour cycle. The movement of stars and other celestial objects across the sky are diurnal. Most active during the daytime. Many …

Occurring or active during the daytime rather than at night: diurnal animals. 3. Botany Opening during daylight hours and closing at night. n. 1. A book containing all the offices for the daily canonical hours of prayer except matins. 2. Archaic. a. A diary or journal. b. A daily newspaper.

Definition of diurnal adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.