昼夜节律
Traditional form:
晝夜節律
Pinyin (reading):
zhòuyèjiélü
Definitions:
- circadian rhythm
Characters:
- 昼 - daytime, daylight
- 夜 - night, dark; under cover of night
- 节 - festival; knot, joint; segment; to economize, to save
- 律 - statute, principle, regulation
Traditional characters: