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insulant

American

[in-suh-luhnt, ins-yuh-] / ˈɪn sə lənt, ˈɪns yə- /

noun

an insulating material, as used in building trades.

Etymology

Origin of insulant

First recorded in 1930–35; insul(ate) + -ant

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.