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

The set comes with a pair of Cliq earplugs, three sets of compatible covers, five sizes of silicone ear tips, and an aluminum earplug case. — Jamie Spain, Condé Nast Traveler, 9 July 2026

There are also plastic and silicone options, which can be just as effective. — Bestreviews, Chicago Tribune, 9 July 2026

To achieve a similar impact, Johnson appears to be wearing a muscular silicone suit over his 6-foot-5 frame, but the extra padding just makes his head look puny. — Amy Nicholson, Los Angeles Times, 9 July 2026

Keep food from getting in the gaps between your counters and stove with inexpensive aluminum or silicone gap covers. — Karen Brewer Grossman, Southern Living, 9 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