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

Also made from nonporous silicone, each liner is made from food-grade silicone that’s nontoxic and BPA-free. —Stephanie Osmanski, Better Homes & Gardens, 7 Sep. 2025

There’s also a flip-top spout lid with a silicone seal for easy pouring. —Alicia Geigel, Southern Living, 5 Sep. 2025

Working quickly, use a silicone spatula or fork to gently fold the egg toward the edge of the skillet opposite the handle and cover the goat cheese filling. —Jeremiah Langhorne, Saveur, 4 Sep. 2025

Madigan had come to Collins’s Los Angeles studio for a scan so the team could create a silicone bald cap covered in thin hair, each individual strand of which had to be hand-punched. —Natalie Oganesyan, Deadline, 4 Sep. 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