spas·mod·ic (sp?z-m?d??k)adj.1. Relating to, affected by, or having the character of a spasm; convulsive.2. Happening intermittently; fitful: spasmodic rifle fire.3. Given to sudden outbursts of energy or feeling; excitable.[New Latin spasm?dicus, from Greek spasm?d?s, from spasmos, spasm; see spasm.]spas·mod?i·cal·ly adv.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.spasmodic (spæz?m?d?k) or rarely spasmodicaladj1. taking place in sudden brief spells2. (Pathology) of or characterized by spasms[C17: New Latin, from Greek spasmos a spasm] spas?modically advCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014spas?mod?ic (spæz?m?d ?k) also spas?mod?i?cal, adj. 1. pertaining to or of the nature of a spasm; characterized by spasms. 2. resembling a spasm; sudden but brief; sporadic: spasmodic efforts at reform. 3. given to or characterized by bursts of excitement. [1675?85;