from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Archaic A quack or charlatan.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. One falsely claiming to possess medical or other skills, especially one who dispenses potions, ointments, etc. supposedly having curative powers.
from the GNU version of the Collaborative International Dictionary of English
- n. One who boasts of his skill in medicines and salves, or of the efficacy of his prescriptions; a charlatan; a quack; a mountebank.
from The Century Dictionary and Cyclopedia
- n. One who boasts of his skill in medicines and salves, or of the efficacy of his nostrums; a charlatan; a quack.
Obsolete Dutch : Middle Dutch quac-, unguent, or quacken, to quack, boast + Middle Dutch salven, to salve.(American Heritage® Dictionary of the English Language, Fourth Edition)
c 1570, from Dutch kwakzalver ("hawker of salve"), from Middle Dutch quacken ("to brag, boast; to croak") (Wiktionary)