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 key to most waterproof formulas are waxes or silicones, which protect the pigments from water and prevents it from breaking down. — Ariana Yaptangco, Glamour, 3 Aug. 2026

The Extra Grip style adds silicone dots in the palm and fingers for improved traction. — ABC News, 1 Aug. 2026

This fragrance- and silicone-free face sunscreen is a great choice for those with sensitive skin who want only non-irritating products. — Caroline Hughes, Travel + Leisure, 31 July 2026

It’s designed with a sturdy, metal lining and has a silicone lid to keep the contents from spilling. — Alicia Geigel, Southern Living, 30 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