DIURNATION


Meaning of DIURNATION in English

ˌdī(ˌ)ərˈnāshən noun

( -s )

Etymology: Latin diurn us of the day, daily + English -ation (as in hibernation ) — more at journal

1. : the habit of sleeping or being quiescent by day

the diurnation of bats

2. : a daily recurrent fluctuation in an ecological community (as the vertical movement of plankton)

Webster's New International English Dictionary.      Новый международный словарь английского языка Webster.