• (a.) Pertaining to, or containing, galena. • (an.) Relating to Galen or to his principles and method of treating diseases.
1. usually cap : of or relating to Galen or his medical principles or method. 2. constituting a galenical.
1. Usually cap: of or relating to Galen or his medical principles or method. ... 2. Constituting a galenical. ... (18 Nov 1997) ... 
In pharmacology, the term galenical refers to a drug obtained from plant or animal tissue, especially from vegetables, rather than being chemically synthesized.