What does "empiric" mean?

Empiric: 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. Among the Greek physicians, those who founded their practice on experience called themselves empirics. Krauth-Fleming. Swallow down opinions as silly people do empirics' pills. Locke.

Additional senses

  1. 2.Pertaining to, or founded upon, experiment or experience; depending upon the observation of phenomena; versed in experiments. In philosophical language, the term empirical means simply what belongs to or is the product of experience or observation. Sir W. Hamilton. The village carpenter . . . lays out his work by empirical rules learnt in his apprenticeship. H. Spencer.
  2. 3.Depending upon experience or observation alone, without due regard to science and theory; -- said especially of medical practice, remedies, etc.; wanting in science and deep insight; as, empiric skill, remedies. Empirical formula. (Chem.) See under Formula.

Sources