guaco definition by Webster's New World
Webster\'s New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
any of several South American plants (genus Mikania of the composite family and genus Aristolochia of the birthwort family) used by the natives for asthma, snakebite, etc.
Origin of guacoAmerican Spanish probably ; from a Mayan language
guaco definition by Wiktionary
(countable and uncountable, plural guacos)