Akademik

ester

n. Chem. any of a class of organic compounds produced by replacing the hydrogen of an acid by an alkyl, aryl, etc. radical, many of which occur naturally as oils and fats.
Derivatives:
esterify v.tr. (-ies, -ied).
Etymology: G, prob. f. Essig vinegar + Aumlther ether

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ester 7 [ester esters] [ˈestə(r)] [ˈestər] noun (chemistry)

a sweet-smelling substance that is formed from an ↑organic acid and an alcohol

Word Origin:

mid 19th cent.: from German, probably from a blend of Essig ‘vinegar’ and Äther ‘ether’.

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Ester, -ne

obs. forms of Easter.

Useful english dictionary. 2012.