Styrofoam Hear it!

Styrofoam definition

☆ Styro·foam (stī′rə fōm′)

rigid, lightweight, cellular polystyrene, used in boat construction, insulation, commercial displays, etc.

Etymology: (poly)styr(ene) + -o- + foam

noun

this substance, or one like it

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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