The Collaborative International Dictionary of English v.0.48:
Pharmacologist \Phar`ma*col"o*gist\, n. [Cf. F. pharmacologiste.] One skilled in pharmacology. [1913 Webster]WordNet (r) 3.0 (2006):
pharmacologist n 1: someone trained in the science of drugs (their composition and uses and effects) [syn: pharmacologist, pharmaceutical chemist]