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 research team revealed that plastination is a new method for managing moisture in wood by replacing water in the cellular structure with a silicone compound to create a durable, hydrophobic barrier that resists swelling, rotting, and cracking. —Prabhat Ranjan Mishra, Interesting Engineering, 6 Nov. 2025

Adame was previously convicted of involuntary manslaughter in 2024 for giving an ultimately fatal silicone butt injection to 26-year-old Karissa Rajpaul in 2019, according to the LA Times. —Madison E. Goldberg, PEOPLE, 6 Nov. 2025

The Snap-on Lip Case, designed with MagSafe technology, is the latest version of the brand’s viral silicone phone shell made to fit any Peptide Lip Treatment on the back. —Kaleigh Werner, Footwear News, 5 Nov. 2025

Place it on parchment paper or a silicone baking mat to fully set. —Cody Godwin, USA Today, 4 Nov. 2025

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