Meaning of chronobiology

chron•o•bi•ol•o•gy

Pronunciation: (kron"ō-bī-ol'u-jē), [key]
— n.
  1. the science or study of the effect of time, esp. rhythms, on living systems.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.