|1.||happening during the day or daily|
|2.||(of flowers) open during the day and closed at night|
|3.||Compare nocturnal (of animals) active during the day|
|4.||a service book containing all the canonical hours except matins|
|[C15: from Late Latin diurnālis, from Latin diurnus, from diēs day]|
diurnal di·ur·nal (dī-ûr'nəl)
Having a 24-hour period or cycle; daily.
Occurring or active during the daytime rather than at night.
|diurnal (dī-ûr'nəl) Pronunciation Key