: a compound containing two ester groups

Word History

First Known Use

1898, in the meaning defined above

Time Traveler
The first known use of diester was in 1898

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Cite this Entry

“Diester.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/diester. Accessed 7 Jul. 2026.

Medical Definition

: a compound containing two ester groups
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