al·ti·ther·mal
| \ ¦altə̇¦thərməl \
Definition of altithermal
: of or belonging to a time during which the climate is relatively warm
—often used of a part of postglacial time
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Merriam-Webster unabridged
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Time Traveler for altithermal
The first known use of altithermal was in 1948
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