Akademik

Quack
1) A practitioner who suggests the use of substances or devices for the prevention or treatment of disease that are known to be ineffective. 2) A person who pretends to be able to diagnose or heal people, but is unqualified and incompetent.
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SYN: charlatan. [Abbreviation of quacksalver, Dutch q., to boast + salf, cream]

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quack 'kwak n a pretender to medical skill: an ignorant or dishonest practitioner
quack·ish -ish adj
quack adj of, relating to, characteristic of, or being a quack <scores of \quack remedies for arthritis (Jane E. Brody)>

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(kwak) [from quacksalver, q.v.] one who fraudulently claims to have ability and experience in the diagnosis and treatment of disease or the effects to be achieved by the treatment.

Medical dictionary. 2011.