polyethylene

noun

poly·​eth·​yl·​ene ˌpä-lē-ˈe-thə-ˌlēn 

: a polymer of ethylene

especially : any of various partially crystalline lightweight thermoplastics (CH₂CH₂)_x that are resistant to chemicals and moisture, have good insulating properties, and are used especially in packaging and insulation

Examples of polyethylene in a Sentence

Recent Examples on the Web

The internal cabling has been upgraded, with a polyethylene dielectric and Linear Crystal Oxygen Free Copper conductors for optimal signal transfer. —Mark Sparrow, Forbes, 1 Nov. 2024

It’s made from high-density polyethylene, or poly lumber, that’s even stronger and longer-lasting than wood. —Shea Simmons, Better Homes & Gardens, 11 Oct. 2024

The researchers found 16 total plastic fibers and particles made of polypropylene, polyamide, nylon and polyethylene vinyl acetate. —Sarah Kuta, Smithsonian Magazine, 18 Sep. 2024

The plastics most commonly used in packaging are polyethylene (of various densities), polypropylene (PP), polyethylene terephthalate (PET) and, to a lesser extent, polystyrene (PS) and polyvinyl chloride (PVC). —Alex Whiting, WIRED, 20 May 2022

Word History

Etymology

poly- + ethylene

First Known Use

1862, in the meaning defined above

Phrases Containing polyethylene

• polyethylene glycol

Kids Definition

polyethylene

noun

poly·​eth·​yl·​ene ˌpäl-ē-ˈeth-ə-ˌlēn 

: a lightweight plastic resistant to chemicals and moisture and used chiefly in packaging

Medical Definition

polyethylene

noun

poly·​eth·​yl·​ene ˌpäl-ē-ˈeth-ə-ˌlēn 

: a polymer of ethylene

especially : any of various lightweight thermoplastics (CH₂CH₂)_x that are resistant to chemicals and moisture and are used especially in packaging, insulation, surgical implants, prostheses, and tubing