ATP·ase (ā'tē-pē'ās, -āz) n. An enzyme that catalyzes the hydrolysis of ATP to ADP, releasing energy that is used in the cell; adenosine triphosphatase.
Main Entry: ATPase Pronunciation: "A-"tE-'pE-"As, -"Az Function: noun : an enzyme that hydrolyzes ATP; especially: one that hydrolyzes ATPto ADP and inorganic phosphate called also adenosine triphosphatase