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

Over-the-counter vaginal moisturizers, including products with hyaluronic acid, and water- or silicone-based lubricants, are other options—however, these items won’t address the root of dryness, which is declining estrogen. —Erica Sweeney, SELF, 4 Feb. 2026

In San Martin Park, the electrical boxes were reinforced with silicone, adding an extra obstacle for the thieves. —Sam Blum, New York Times, 4 Feb. 2026

The silicone prosthetics were incredibly thin, which meant that putting a ring through them could rip them if they were accidentally tugged or pulled too hard. —Sophia Panych, Allure, 3 Feb. 2026

Now it's got a silicone-free option that helps boost shine and define wavy, curly and coily hair types. —Jackie Fields, PEOPLE, 3 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