This word is acceptable for play in the US dictionary that is being used in the following games:

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adj. Of or pertaining to the climate of a region in the past

Of or pertaining to climatic conditions of former geologic periods: a term introduced by C. A. White to describe “formerly existing conditions which, in certain parts of the earth, were more or less materially different from those which now exist in the same parts.”

"The principle source of uncertainty in calibrating the paleoclimatic record with the CO2 levels of today is the lack of data on aerosols."

paleoclimate    paleoclimatology   

paleoclimatically   

paleoclimate    selenographic    time-of-flight    post-katrina    3-tier