Etymology
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Styrofoam (n.)

1950, trademark name (Dow Chemical Co.), from -styr- (from polystyrene) + connective -o- + foam (n.).

updated on October 10, 2017

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Definitions of Styrofoam from WordNet

Styrofoam (n.)
a light resilient foam of polystyrene;
From wordnet.princeton.edu, not affiliated with etymonline.

Dictionary entries near Styrofoam

stylize

stylus

stymie

styptic

styrene

Styrofoam

Styx

suasion

suasive

suave

suavity