Empiric

Webster's Dictionary

(1): ( a.) Alt. of Empirical

(2): ( n.) One who confines himself to applying the results of mere experience or his own observation; especially, in medicine, one who deviates from the rules of science and regular practice; an ignorant and unlicensed pretender; a quack; a charlatan.

(3): ( n.) One who follows an empirical method; one who relies upon practical experience.

The Nuttall Encyclopedia

The name given to any who practises an art from the mere experience of results, apart from all reference to or knowledge of the scientific explanation.