Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Medical
  • 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

February 9, 2016

marked by high spirits and laughter

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

image1037863653

Which of the following refers to thin, bending ice, or to the act of running over such ice?

kittly-benders spindrift duvet pince-nez
Name That Thing

10 quick questions: hear them, spell them, and see how your skills compare to the crowd.

TAKE THE QUIZ
SCRABBLE® Sprint

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

TAKE THE QUIZ