su·crase (so?o?kr?s?, -kr?z?)n. See invertase.[French sucre, sugar (from Old French sukere; see sugar) + -ase.]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.sucrase (?sju?kre?z) n (Biochemistry) another name for invertase[C19: from French sucre sugar + -ase]Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014in?vert?ase (?n?v?r te?s, -te?z) also in?ver?tin, n. an enzyme that causes the inversion of cane sugar into invert sugar. Also called sucrase. Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.