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

Here’s how to keep it at bay with our favorite lubes made of water, silicone, or natural oil. —Amanda Chatel, Wired News, 7 June 2025

Each product is free of harsh chemicals, parabens, sulfates, phthalates, silicones, and synthetic fragrances. —Robyn Merrett, StyleCaster, 6 June 2025

Using a diatomaceous dish mat with small feet or one encased in a silicone mesh may also help prevent warping as even just a little bit of elevation allows for airflow under the mat. —Emily Farris, Bon Appetit Magazine, 3 June 2025

Safe for most skin types, the formula is free of fragrance, oil, mineral oil, alcohol, talc, silicone, and gluten. —Iman Balagam, Vogue, 30 May 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