noun
definition
The sound made by a duck.
example
Did you hear that duck make a quack?
verb
definition
To make a noise like a duck.
example
Do you hear the ducks quack?
Examples of quack in a Sentence
Hence the modern sense of empirical as applied to the guess work of an untrained quack or charlatan.
In other cases, he recommended his own quack medicines.
Based in Utah, XanGo has come under fire from the FDA, the Center for Science in the Public Interest, Skeptical Inquirer magazine,and Quack Watch.
But only a few months ago, the Small Business Minister described them as ' the quack cure for regulations '.
Ducks do n't quack all the time but can be vocal if something surprises them.
He returned to Zeeland to die, but was cured mysteriously by a strolling quack.
I have recently filmed Daisy the Duck for Salford University disproving the urban myth that a Ducks Quack does n't echo.
I have recently filmed Daisy the duck for Salford University disproving the urban myth that a Ducks quack doesn't echo.
In the second instance, while the Hebrew says that the man who rebels against his Heavenly Benefactor will a fortiori rebel against a human benefactor, the Greek text gives a cynical turn to the verse, "Let the man who rebels against his true benefactor be punished through the tender mercies of a quack."
A quack doctor who was virtually illiterate, Joseph Healey was one of the main leaders of the parliamentary reform movement in Lancashire.
James is put to work at country fairs, promoting a quack nostrum for pain relief.
Quack Quack are from Leeds, an instrumental three-piece consisting of bassist, drummer and keyboardist.
So, where does the word quack come from?
Although Grattan had a profound contempt for Emmet's political understanding, describing him as a quack in politics who set up his own crude notions as settled rules, Emmet was among the more prudent of the United Irishmen on the eve of the rebellion.
His scientific life was now over, his political life was to begin; in the notoriety of that political life his great scientific and philosophical knowledge was to be forgotten, the high position he had given up denied, and he himself scoffed at as an ignorantcharlatan, who had sold quack medicines about the streets of Paris, and been glad to earn a few sous in the stables of the comte d'Artois.
An old quack doctor named Levett, who had a wide practice, but among the very poorest class, poured out Johnson's tea in the morning and completed this strange menagerie.
The terrible losses sustained by whole communities of farmers, planters, foresters, &c., from plant diseases have naturally stimulated the search for remedies, but even now the search is too often conducted in the spirit of the believer in quack medicines, although the agricultural world is awakening to the fact that before any measures likely to be successful can be attempted, the whole chain of causation of the disease must be investigated.
In after years he so far forgot himself as to write of Saint-Simon as a depraved quack, and to deplore his connexion with him as purely mischievous.
The latter process, which was known to Basil Valentine, was commercially applied by the quack doctor, Joshua Ward (1685-1761), of Twickenham, England, to the manufacture of the acid, which was known as "oil of vitriol made by the bell" or per campanum.
A quack is one who pretends to knowledge of which he is ignorant, a charlatan, particularly a medical impostor.