A chemical compound formed by the reaction of an acid, usually an organic acid, with an alcohol. Many esters have a characteristic, often fruity smell.
example
Fette und pflanzliche Öle sind chemisch gesehen Ester des Alkohols Glycerin.
Fats and vegetable oils are, chemically speaking, esters of the alcohol glycerol.
Usage tips
Register
'Ester' is a technical term from chemistry. In everyday life, you will rarely hear this word unless the topic is ingredients in foods, cosmetics, or perfume.
EXAMPLE
Im Chemieunterricht haben wir die Synthese von Estern gelernt.
In chemistry class, we learned the synthesis of esters.
Word family
The chemical process in which an ester is formed is called 'die Veresterung' (esterification). If you see this word, you know that it has to do with esters.
EXAMPLE
Die Veresterung ist eine wichtige Reaktion in der organischen Chemie.
Esterification is an important reaction in organic chemistry.
Typical association
Esters are very often associated with smells and aromas, since many of them are responsible for fruity or floral scents. They are a main component of many perfumes and artificial flavorings.
EXAMPLE
Der typische Geruch von Bananen wird durch einen bestimmten Ester verursacht.
The typical smell of bananas is caused by a specific ester.