diurnal

/dai'ə:nl/

Thân thiện

Diurnal animals like squirrels are active during the day.

Definition

1. Adjective:
   • Having a daily cycle or occurring every day: Refers to events, patterns, or rotations that complete one full cycle within a 24-hour period.
   • Of or belonging to or active during the day: Describes organisms or activities that are primarily operative in the daylight hours, as opposed to the night.

Examples of Usage

• Adjective:
  • The diurnal rotation of the Earth is responsible for the cycle of day and night.
  • Most birds, like robins, are diurnal creatures.
  • The diurnal rhythm of the plant involves opening its flowers at dawn.

Advanced Usage

• Scientific Context: In astronomy, "diurnal" describes the apparent daily motion of celestial bodies across the sky.
  • The diurnal motion of the stars is caused by Earth's rotation.
• Biological Context: In biology and ecology, it categorizes an animal's primary period of activity.
  • The study compared the hunting strategies of diurnal and nocturnal predators.

Variants and Related Words

• Diurnally (adverb): In a manner that occurs every day or during the daytime.
  • The temperature fluctuates diurnally.
• Diurnality (noun): The condition of being active during the day.
  • The diurnality of the species is an adaptation to its environment.

Synonyms

• Daily: Occurring, done, or produced every day.
• Daytime: Of, relating to, or occurring during the day.

Antonyms

• Nocturnal: Active at night.
• Crepuscular: Active during twilight (dawn and dusk).

Học thuật

Adjective

1. having a daily cycle or occurring every day
   • diurnal rotation of the heavens
2. 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