1590s, "the science of time," from Middle French chronologie or directly from Modern Latin chronologia; see chrono- + -logy. Related: Chronologer (1570s). Meaning "particular statement of the supposed order of certain past events" is from 1610s.
chronicle
chronicler
chrono-
chronograph
chronological
chronology
chronometer
chrysalid
chrysalis
chrysanthemum
chryselephantine