mal·tase (môl?t?s?, -t?z?)n. An enzyme that catalyzes the hydrolysis of maltose to glucose.American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.maltase (?m??lte?z) n (Biochemistry) an enzyme that hydrolyses maltose and similar glucosides (?-glucosides) to glucose. Also: ?-glucosidase [C19: from malt + -ase]Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014malt?ase (?m?l te?s, -te?z) n. an enzyme that converts maltose to glucose. [1885?90] Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.