as·par·tic acid (?-spär?t?k)n. A nonessential amino acid, C4H7NO4, found especially in young sugarcane and sugar-beet molasses.[From asparagus (from its being obtained from asparagine).]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.aspartic acid (??sp??t?k) n (Biochemistry) a nonessential amino acid that is a component of proteins and acts as a neurotransmitter[C19: from aspar(agus) + -ic]Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014as?par?tic ac?id (??sp?r t?k) n. a nonessential amino acid, C4H7NO4, abundant in molasses. Abbr.: Asp; Symbol: D (aspar (agus) + -tic] Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.as·par·tic acid (?-spär?t?k) A nonessential amino acid. See more at amino acid.The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.