Substance or combination of substances intended to be pharmacologically active, specially prepared to be prescribed, dispensed or administered by authorized personnel to prevent or treat diseases in humans or animals. Found on http://www.ada.org/glossaryforprofessionals.aspx
Med'i·ca·ment noun [ Latin medicamentum , from medicare , medicari , to heal: confer French médicament . See Medicable .] Anything used for healing diseases or wounds; a medicine; a healing application. Found on http://www.encyclo.co.uk/webster/M/39