Search Result for "time scale":
Wordnet 3.0

NOUN (1)

1. an arrangement of events used as a measure of duration;
- Example: "on the geological time scale mankind has existed but for a brief moment"



WordNet (r) 3.0 (2006):

time scale
    n 1: an arrangement of events used as a measure of duration; "on
         the geological time scale mankind has existed but for a
         brief moment"