nocturnal

形容词

1. 1

   夜行性的、夜间活动的

   Owls are nocturnal birds that hunt small animals after dark.

   猫头鹰是夜行性鸟类，天黑后猎捕小动物。

2. 2

   夜间的、夜里的

   He sees a doctor about his nocturnal coughing fits.

   他因为夜间的咳嗽发作去看医生。