In enzymology, an alkenylglycerophosphocholine hydrolase () is an enzyme that catalyzes the chemical reaction
Thus, the two substrates of this enzyme are 1-(1-alkenyl)-sn-glycero-3-phosphocholine and H<sub>2</sub>O, whereas its two products are aldehyde and sn-glycero-3-phosphocholine.
This enzyme belongs to the family of hydrolases, specifically those acting on ether bonds (ether hydrolases). The systematic name of this enzyme class is 1-(1-alkenyl)-sn-glycero-3-phosphocholine aldehydohydrolase. This enzyme is also called lysoplasmalogenase. This enzyme participates in ether lipid metabolism.