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

Insulating silicone gaskets and foam silicone pads isolate the electronics and fans at the bottom from heat above; a fine steel mesh allows air to flow upwards from the fans, while preventing debris from falling into the componentry. —Abhimanyu Ghoshal, New Atlas, 13 Feb. 2026

Can a silicone pan liner be safely used under a broiler? —Taylor Tobin, Southern Living, 13 Feb. 2026

The solution saw Myren wearing a bald cap with a silicone forehead and a wig created in several sections so the hair could fall off piece by piece. —Simon Thompson, HollywoodReporter, 11 Feb. 2026

Spread the glaze evenly over the top of the salmon using your hands or a silicone brush. —Ashia Aubourg, Outside, 10 Feb. 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