Diurnal

adjective/daɪˈɝ.nəl/science
Definition
Of or during the day; active in the daytime.
Etymology
From Latin diurnālis, from diēs (“day”). Doublet of journal.
Synonyms
cyclical, cyclic
In a sentence
  • Squirrels are diurnal, so the feeder is empty by dusk.
Tags
Source
commonplace words.md
added 2026-10-09