day length
/ˈdeɪ lɛŋ(k)θ/noun
1The length of the day, either: (a) the time between sunrise and sunset (i.e. the duration of daylight), especially as it varies at different times of the year or at different latitudes; or (b) the time from one sunrise to the next (on earth currently 24 hours). Also as a count noun: a day of a specified length.
- Apparently rare during the 19th cent..
2 Biology. The length of daily illumination which an organism receives; the length of light exposure which is most effective in stimulating a particular physiological process, such as reproduction, in a plant or other organism; = photoperiod.
adjective
Designating clothes (especially dresses and skirts) that are shorter in length than evening clothes, and typically intended for use during the day.
Origin
Mid 16th century. From day + length.
- plattnerite
- Plattsburgh
- platy
- platy-
- platybasia
- platybasic
- platycarpous
- platycephalic
- platycephaly
- platycercine
- platycnemia
- platycnemic
- platycnemy
- platycodon
- platycoelous
- platycranial
- platycrinid
- platycrinoid
- platygasterid
- platygastrid
- platyhelminth
- Platyhelminthes
- platyhieric
- platyknemia
- platyknemic