insulative

[ in-suh-ley-tiv, ins-yuh- ]

/ ˈɪn səˌleɪ tɪv, ˈɪns yə- /

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adjective

serving to protect or insulate: glassware shipped in insulative packing.

QUIZ

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Origin of insulative

First recorded in 1940–45; insulate + -ive

Therefore, pelts of these tropical procyonids do not have the same insulative value as the prime winter coat of Procyon lotor.
Metabolic Adaptation to Climate and Distribution of the Raccoon Procyon Lotor and Other Procyonidae|John N. Mugaas