ester

noun (n)

1. formed by reaction between an acid and an alcohol with elimination of water (noun.substance)

   Sumber: wordnet30

2. An ethereal salt, or compound ether, consisting of an organic radical united with the residue of any oxygen acid, organic or inorganic; thus the natural fats are esters of glycerin and the fatty acids, oleic, etc. (noun)

   Sumber: webster1913