indole

noun

in·​dole ˈin-ˌdōl 

: a crystalline alkaloid compound C₈H₇N that is a decomposition product of proteins containing tryptophan, that can be made synthetically, and that is used in perfumes

also : a derivative of indole

Examples of indole in a Sentence

Recent Examples on the Web

As part of the testing, the team discovered the enzyme can turn the organic compound indole to indigo. — Sarah Jones, Footwear News, 5 June 2026

Compounds known as indoles, found in vegetables from the cabbage family such as broccoli, cabbage and cauliflower, can activate Treg cells and help prevent gut inflammation. — Mitzi Nagarkatti, The Conversation, 10 Oct. 2025

This transition is accompanied by exposure to breast milk, which contains microbes capable of producing indoles. — Jenny Lehmann, Discover Magazine, 7 Feb. 2025

Word History

Etymology

International Scientific Vocabulary ind- + -ole

First Known Use

1869, in the meaning defined above

Rhymes for indole

• bankroll
• bedroll
• borehole
• cajole
• catchpole
• charcoal
• condole
• control
• dipole
• downhole
• enroll
• extol

Medical Definition

indole

noun

in·​dole ˈin-ˌdōl 

: a crystalline compound C₈H₇N that is found along with skatole in the intestines and feces as a decomposition product of proteins containing tryptophan and that can be made synthetically

also : a derivative of indole