An ester is a functional group in organic chemistry; specifically a chemical compound derived from an acid in which at least one hydroxyl group is replaced by alkoxy group.

Look up Ester, ester, Estèr, or éster in Wiktionary, the free dictionary.

Ester may also refer to:

• Ester C, ascorbyl palmitate, used as an antioxidant food additive
• Ester gum, or Ester of wood rosin, a food additive used as an emulsifier and stabiliser
• Ester pyrolysis, a vacuum pyrolysis reaction

• Ester, Alaska, a town
  • Ester Camp Historic District, Alaska
• Ester Mountains in Germany
• Ester (Castro Daire), parish in Castro Daire, Portugal

• Ester, the Catalan, Italian, Portuguese and Spanish version of the female given name Esther
• Laura Ester (1990), Spanish female water polo goalkeeper
• Pauline Ester, French singer born Sabrina Ocon in 1963
• Peter Ester (1953–2022), Dutch sociologist and politician
• Sofia Ester (born 1978), Portuguese author
• Ester (footballer) (born 1982), Brazilian footballer

• Typhoon Ester (disambiguation)

• Esther (disambiguation)
• Hadassah (disambiguation)

This disambiguation page lists articles associated with the title Ester.
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