Sentence:  According to the Food and Drug Administration ( FDA ) , `` Doctor '' Ghadiali , Dr. Albert Abrams and his clique , and Dr. Wilhelm Reich - to name three notorious device <WSD>quacks</WSD> - succeeded , respectively , in distributing 10000 , 5000 , and 2000 fake health machines . 
Meaning of the word marked with <WSD> tags:  an untrained person who pretends to be a physician and who dispenses medical advice