Meaning of dendrochronology

den•dro•chro•nol•o•gy

Pronunciation: (den"drō-kru-nol'u-jē), [key]
— n.
  1. the science dealing with the study of the annual rings of trees in determining the dates and chronological order of past events.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.