The Collaborative International Dictionary of English v.0.48:
Embrocation \Em`bro*ca"tion\, n. [NL. embrocatio: cf. F. embrocation.] (Med.) (a) The act of moistening and rubbing a diseased part with spirit, oil, etc. (b) The liquid or lotion with which an affected part is rubbed. [1913 Webster]WordNet (r) 3.0 (2006):
embrocation n 1: a medicinal liquid that is rubbed into the skin to relieve muscular stiffness and pain [syn: liniment, embrocation]