di·ur·nal
adjective/daɪˈɜːnl/
/daɪˈɜːrnl/
- (biology) (of animals) active during the day
日间活动的；昼行性的 - Unlike most other bats, this species is diurnal.
这种蝙蝠与大多数蝙蝠不同，是在日间活动的。
- Unlike most other bats, this species is diurnal.
- (astronomy) taking one day
周日的 - the diurnal rotation of the earth
地球的周日自转
- the diurnal rotation of the earth
Word Originlate Middle English (as a term in astronomy): from late Latin diurnalis, from Latin diurnus ‘daily’, from dies ‘day’.