昼夜节律

晝夜節律
zhòuyèjiélǜ
circadian rhythm

CEDICT

  1. (biology) circadian rhythm
  2. circadian rhythm

Wiktionary

Entry Composition

1 昼夜 zhòuyè
  1. day and night
  2. period of 24 hours
  3. continuously, without stop
2 节律 jiélǜ
  1. rhythm
  2. pace