This word is not acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. The reaction of an ester with an alcohol in order to replace the alkoxy group; it is used in the synthesis of polyesters and in the production of biodiesel

"The oil is transformed through a process called transesterification, which removes glycerine and adds methanol, leaving a thinner product that can power a diesel engine."