ester Estella • esterase · · · Info · Definitions · Characters · · ester · · Text Latin · · Script 5 · · Length Definitions · · · (noun) formed by reaction between an acid and an alcohol with elimination of water. · · Noun Definition 1 Characters · · e latin small letter e U+0065 r latin small letter r U+0072 s latin small letter s U+0073 t latin small letter t U+0074