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Medical Term:


Pronunciation: es′tĕr

Definition: An organic compound containing the grouping, –X(O)–O–R (X = carbon, sulfur, phosphorus, etc.; R = radical of an alcohol), formed by the elimination of H2O between the –OH of an acid group and the –OH of an alcohol group; usually written as in ethyl acetate (from acetic acid and ethyl alcohol), CH3CO—OC2H5 or CH3COOC2H5.