In enzymology, an acylglycerol lipase (EC 3.1.1.23) is an enzyme that catalyzes a chemical reaction that uses water molecules to break the glycerol monoesters of long-chain fatty acids.
This enzyme belongs to the family of hydrolases, specifically those acting on carboxylic ester bonds. The systematic name of this enzyme class is glycerol-ester acylhydrolase. Other names in common use include monoacylglycerol lipase, monoacylglycerolipase, monoglyceride lipase, monoglyceride hydrolase, fatty acyl monoester lipase, monoacylglycerol hydrolase, monoglyceridyllipase, and monoglyceridase. This enzyme participates in glycerolipid metabolism.