chronobiology

noun

Etymology: Etymology tree Ancient Greek χρόνος (khrónos)bor. English chrono- Proto-Indo-European *gʷeyh₃-der. Ancient Greek βίος (bíos) Proto-Indo-European *leǵ- Ancient Greek λόγος (lógos) Proto-Indo-European *-h₂ Proto-Indo-European *-éh₂ Proto-Indo-European *-i-eh₂ Proto-Hellenic *-íā Ancient Greek -ῐ́ᾱ (-ĭ́ā) Ancient Greek -λογῐ́ᾱ (-logĭ́ā)bor. New Latin -logia New Latin biologialbor. English biology English chronobiology From chrono- + biology.

1. The study of the effects of time on biological systems, especially the effects of periodicity