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foamed metal

American  
Or foam metal

noun

Chemistry, Metallurgy.

  1. a uniform foamlike metal structure produced when hydrogen bubbles are evolved from metal hydrides uniformly dispersed throughout a host metal or metal alloy: used as a structural material because of its shock-absorbing properties and light weight.

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.