geological time

Noun
  1. The time of the physical formation and development of the earth (especially prior to human history) (synset 115140868)
    is a type of: time - the continuum of experience in which events pass from the future through the present to the past
    subtypes:
    • aeon, eon - the longest division of geological time
    • geological period, period - a unit of geological time during which a system of rocks formed
    • era, geological era - a major division of geological time; an era is usually divided into two or more periods
    • epoch - a unit of geological time that is a subdivision of a period and is itself divided into ages
    same as: geologic time

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