diurnal

[ dahy-ur-nl ]
/ daɪˈɜr nl /
SEE SYNONYMS FOR diurnal ON THESAURUS.COM

adjective

of or relating to a day or each day; daily.
of or belonging to the daytime (opposed to nocturnal).
Botany. showing a periodic alteration of condition with day and night, as certain flowers that open by day and close by night.
active by day, as certain birds and insects (opposed to nocturnal).

noun

Origin of diurnal

1400–50; late Middle English < Latin diurnālis, equivalent to diurn(us) daily + -ālis -al1

OTHER WORDS FROM diurnal

WORDS THAT MAY BE CONFUSED WITH diurnal

diurnal nocturnal

Words nearby diurnal

ditzy, diu, diuresis, diuretic, diuril, diurnal, diurnal arc, diurnal circle, diurnal motion, diurnal parallax, diuron

Words related to diurnal

durable, perpetual, long-lasting, enduring, stable, regularly, often, periodic, constantly, regular, routine, everyday, day-to-day, invariable, set, everlasting, perennial, ordinary, commonplace, common

Example sentences from the Web for diurnal

British Dictionary definitions for diurnal

diurnal
/ (daɪˈɜːnəl) /

adjective

happening during the day or daily
(of flowers) open during the day and closed at night
(of animals) active during the day Compare nocturnal

noun

a service book containing all the canonical hours except matins

Derived forms of diurnal

diurnally, adverb

Word Origin for diurnal

C15: from Late Latin diurnālis, from Latin diurnus, from diēs day

Medical definitions for diurnal

diurnal
[ dī-ûr′nəl ]

adj.

Having a 24-hour period or cycle; daily.
Occurring or active during the daytime rather than at night.

Other words from diurnal

di•ur′nal•ly adv.

Scientific definitions for diurnal

diurnal
[ dī-ûr′nəl ]

  1. Occurring once in a 24-hour period; daily.
  2. Having a 24-hour cycle. The movement of stars and other celestial objects across the sky are diurnal.
Most active during the daytime. Many animals, including the apes, are diurnal.
Having leaves or flowers that open in daylight and close at night. The morning glory and crocus are diurnal. Compare nocturnal.