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

Patients of color, with skin more prone to scarring, should ask about treatments primed to minimize that side effect, in particular silicone sheeting and potentially steroid injections. — The Editors, Robb Report, 19 July 2026

Paying the price of a luxury car for a giant silicone doll that needs to be recharged every two to four hours seems like a questionable choice. — Maryna Holovnova, New Atlas, 19 July 2026

Both the containers and lids are made from glass, and the lids are sealed with food-safe silicone that latches into place on both sides for an airtight design without leaks. — Caley Sturgill, Southern Living, 18 July 2026

Be cautious with the silicone gaskets or seals, which are typically small and either white or clear. — Nafeesah Allen, Better Homes & Gardens, 15 July 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