|the offspring of a zebra and a donkey.|
|a fool or simpleton; ninny.|
|polystyrene (pŏl'ē-stī'rēn) Pronunciation Key
A brittle synthetic polymer composed of repeated styrene units. Polystyrene is transparent and rigid because the benzene rings in each styrene unit prevent the polystyrene chains from arranging themselves into a tight crystalline structure. Polystyrene has a wide variety of uses, especially as a solid foam for insulation and packaging.