styrofoam

Syllables: sty·ro·foam/ˈstaɪ.ɹə.fəʊm/US/ˈstaɪ.ɹə.foʊm/

styrofoam noun: expanded polystyrene foam, such as is used in cups and packaging.

Noun

styrofoam (countable and uncountable, plural styrofoams)

Expanded polystyrene foam, such as is used in cups and packaging.
- A while ago I read your column concerning the effects of hot tea on styrofoam cups.1988 November 4, Cecil Adams, “The Straight Dope”, in Chicago Reader
- In the past two years, NASA’s Kepler Space Telescope has located nearly 3,000 exoplanet candidates ranging from sub-Earth-sized minions to gas giants that dwarf our own Jupiter. Their densities range from that of styrofoam to iron.2013 May-June, Kevin Heng, “Why Does Nature Form Exoplanets Easily”, in American Scientist, volume 101, number 3, archived from the original on 09 May 2013, page 184

மலக்கிய மெத்து

plural	styrofoams

Genericized trademark of Styrofoam, from -styr- (from polystyrene) + -o- + foam.

What does styrofoam mean?: Styrofoam means expanded polystyrene foam, such as is used in cups and packaging.
What is styrofoam in Tamil?: Styrofoam in Tamil is மலக்கிய மெத்து. See Styrofoam meaning in Tamil.
What part of speech is styrofoam?: Styrofoam is a noun.
How do you pronounce styrofoam?: Styrofoam is pronounced /ˈstaɪ.ɹə.fəʊm/ (UK).
What is the plural of styrofoam?: The plural of styrofoam is styrofoams.

Adapted from Wiktionary: styrofoam (page history and authors); Styrofoam (Tamil Wiktionary) (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

Last updated: 2026-09-02

Pronunciation audio from Wikimedia Commons, each file under its own free license: LL-Q1860 (eng)-Vealhurl-styrofoam.wav.

Cite this entry: “styrofoam.” Word.ws, https://word.ws/styrofoam. Based on Wiktionary, CC BY-SA 4.0.