# polyethylene

/ˌpɑˌɫiˈɛθəˌɫin/ (US) · /pˌɒlɪˈɛθɪlˌiːn/ (UK) · CEFR C1 · Noun

Source: https://englishreference.com/word/polyethylene
Updated: 2026-05-18

## Definition

a type of plastic that is very strong and flexible. It is used to make things like plastic bags, bottles, and containers.

For teachers: a thermoplastic polymer derived from ethylene, characterized by high strength-to-density ratios and chemical inertness. It is the most widely produced synthetic polymer globally.

## Examples

- The plastic bottle is made of polyethylene.
- Most grocery bags are manufactured from low-density polyethylene because it is lightweight and durable.
- Engineers often choose polyethylene for industrial applications due to its resistance to moisture and its ability to withstand extreme temperatures without degrading.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.