es·ter
noun/ˈestə(r)/
/ˈestər/
(chemistry)- a chemical that is formed by the reaction between an acid and an alcohol. Esters made from acids that contain carbon are generally sweet-smelling.
酯（由有机酸和醇形成的芳香物质） Word Originmid 19th cent.: from German, probably from a blend of Essig ‘vinegar’ and Äther ‘ether’.