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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.
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Origin of insulative

First recorded in 1940–45; insulate + -ive
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

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