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Polystyrene vs Foam - What's the difference?

polystyrene | foam |

As nouns the difference between polystyrene and foam

is that polystyrene is polystyrene while foam is a substance composed of a large collection of bubbles or their solidified remains.

As a verb foam is

to form or emit foam.

polystyrene

English

(wikipedia polystyrene)

Noun

(en noun)
  • (organic chemistry) A vinylic polymer of styrene, CH2CHphenyl.
  • (organic chemistry) An alkane chain of benzene molecules, RCH2CHphenylR.

    • Derived terms

    * styrofoam * expanded polystyrene (EPS)

    foam

    English

    Noun

  • A substance composed of a large collection of bubbles or their solidified remains.
  • * {{quote-magazine, year=2013, month=May-June, author= Charles T. Ambrose
    • , title= Alzheimer’s Disease , volume=101, issue=3, page=200, magazine=(American Scientist) , passage=Similar studies of rats have employed four different intracranial resorbable, slow sustained release systems—surgical foam , a thermal gel depot, a microcapsule or biodegradable polymer beads.}}
  • (by extension) Sea foam; (figuratively) the sea.

    • Derived terms

    * foamy

    Verb

    (en verb)
  • To form or emit foam.
  • * Bible, Mark ix. 18
    • He foameth , and gnasheth with his teeth.
  • * 1877 , (Anna Sewell), (Black Beauty) Chapter 23[http://en.wikisource.org/wiki/Black_Beauty/23]
    • What I suffered with that rein for four long months in my lady's carriage, it would be hard to describe, but I am quite sure that, had it lasted much longer, either my health or my temper would have given way. Before that, I never knew what it was to foam at the mouth, but now the action of the sharp bit on my tongue and jaw, and the constrained position of my head and throat, always caused me to froth at the mouth more or less.