imidazole

 
Pronunciation: /ˌɪmɪˈdeɪzəʊl, ɪˈmɪdəzəʊl/

noun

[mass noun] Chemistry
  • a colourless crystalline compound with mildly basic properties, present as a substituent in the amino acid histidine.
    • a heterocyclic compound; chemical formula: C3H4N2

Origin:

late 19th century: from imide + azo- + -ole