quack 1
(kwăk)n. The characteristic sound uttered by a duck.
intr.v. quacked,
quack·ing,
quacks To utter the characteristic sound of a duck.
[Middle English quek, of imitative origin.]
quack′y adj.
quack 2
(kwăk)n.1. An untrained person who pretends to be a physician and dispenses medical advice and treatment.
2. A charlatan; a mountebank.
adj. Relating to or characteristic of a quack: a quack cure.
intr.v. quacked,
quack·ing,
quacks To act as a medical quack or a charlatan.
quack′er·y n.
quack′ish adj.
quack′ish·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.
quacky
(ˈkwækɪ) adj,
quackier or quackiest1. sounding like a quack
2. informal characterized by quackery
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014