Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

polystyrene

play
noun poly·sty·rene \ˌpä-lē-ˈstī-ˌrēn\

Definition of polystyrene

  1. :  a polymer of styrene; especially :  a rigid transparent thermoplastic that has good physical and electrical insulating properties and is used especially in molded products, foams, and sheet materials



1927

First Known Use of polystyrene

1927


Medical Dictionary

polystyrene

play
noun poly·sty·rene \ˌpäl-i-ˈstī(ə)r-ˌēn\

Medical Definition of polystyrene

  1. :  a polymer of styrene; especially :  a rigid transparent thermoplastic that has good physical and electrical insulating properties and is used especially in molded products, foams, and sheet materials





Seen and Heard

What made you want to look up polystyrene? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

looking or feeling very sad

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

dog-eating-apple

Which is a synonym of asperse?

beat placate divulge defame
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ