polystyrene: meaning, definition, pronunciation and examples

Not exactly. 'Styrofoam' is a trademarked brand of extruded polystyrene foam, often used for insulation and crafts. In casual US English, it's often used for disposable cups and containers, but those are typically made from expanded polystyrene (EPS).

Yes, but it is often not accepted in curbside recycling programs due to its low density and the specialized equipment required. It usually needs to be taken to specific drop-off facilities.

Expanded Polystyrene (EPS) is made from small beads fused together, creating a more brittle, bead-like structure (common in packaging). Extruded Polystyrene (XPS) is a continuous, smoother, denser foam with better moisture resistance (common in insulation boards).

While commonly used, some studies suggest hot liquids can cause trace amounts of styrene (a component) to leach. For very hot items, alternatives like paper or polypropylene are often considered safer.

A lightweight synthetic polymer used for thermal insulation, packaging, and disposable food containers.

Polystyrene is usually technical, everyday in register.

Polystyrene: in British English it is pronounced /ˌpɒl.iˈstaɪ.riːn/, and in American English it is pronounced /ˌpɑː.liˈstaɪ.riːn/. Tap the audio buttons above to hear it.