nocturnal
/nɒkˈtɜːnəl/adjective
- done, occurring, or active at night夜的; 夜间发生的; 夜间活动的：
most owls are nocturnal.
大多数猫头鹰在夜间出没。
派生词
nocturnally
adverb词源
late 15th cent.: from late Latin nocturnalis, from Latin nocturnus 'of the night', from nox, noct- 'night'.