- a light, spongy rubber, used for mattresses, cushions, etc.
Origin of foam rubber
First recorded in 1940–45
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for foam rubber
A foam-rubber mattress, sheets, and one blanket finished off the bed.Highways in Hiding
George Oliver Smith
Something that looked exactly like foam-rubber was revealed.
The outside of Dillon looked remarkably like something made out of foam-rubber.
Obviously, whatever was wearing this foam-rubber replica of Dillon was not human!