silicone

noun

sil·​i·​cone ˈsi-lə-ˌkōn 

: any of various polymeric organic silicon compounds obtained as oils, greases, or plastics and used especially for water-resistant and heat-resistant lubricants, varnishes, binders, and electric insulators

Examples of silicone in a Sentence

a prosthesis made of silicone

Recent Examples on the Web

Certain beauty and skincare essentials aren’t conducive to being poured into reusable bottles, but for the ones that are—like shampoo, conditioner, body wash, lotion, and face wash—refillable silicone bottles save an enormous amount of space in a toiletry bag. —Kayla Kitts, Travel + Leisure, 9 May 2026

Made with nontoxic, BPA-free, food-grade silicone that's microwave-safe, freezer-safe and dishwasher-safe. —ABC News, 9 May 2026

Thumb knives are silicone sleeves that slip over your thumb and hold a small blade where your thumbnail is located, giving you more cutting power per pinch. —Kim Toscano, Southern Living, 9 May 2026

The headband is plastic with a soft silicone padding on the bottom. —Mark Knapp, PC Magazine, 8 May 2026

Word History

Etymology

silicon + -one

First Known Use

1943, in the meaning defined above

Phrases Containing silicone

• silicone rubber

Rhymes for silicone

• acetone
• anglophone
• baritone
• bourguignon
• buspirone
• chaperon
• chaperone
• cobblestone
• collarbone
• cornerstone
• cortisone
• dictaphone

Kids Definition

silicone

noun

sil·​i·​cone ˈsil-ə-ˌkōn 

: any of various silicon compounds that contain carbon and hydrogen, are obtained as oily or greasy substances or plastics, and are used especially for water-resistant and heat-resistant lubricants and varnishes

Medical Definition

silicone

noun

sil·​i·​cone ˈsil-ə-ˌkōn 

: any of various polymeric organic silicon compounds which are obtained as oils, greases, or plastics and some of which have been used as surgical implants