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

Best of all, it's made from platinum food-grade silicone. —Kristin Braswell, Travel + Leisure, 8 Mar. 2026

The researchers are now working on further improving the ionic conductivity of the silicone electrolyte – and at the same time looking for a suitable industrial partner to begin commercializing the technology, according to a press release. —Prabhat Ranjan Mishra, Interesting Engineering, 6 Mar. 2026

These silicone reusable straws fold up and fit into a compact tin. —Terri Peters, Parents, 6 Mar. 2026

The footage inside the silicone throat was shot weeks prior; when the camera cuts to Howard, production used scopes of different lengths to indicate how far the tube may have gone down his throat. —Marah Eakin, Vulture, 6 Mar. 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