Definitions for galenˈgeɪ lən; gəˈli nəs
Random House Webster's College Dictionary
Ga•lenˈgeɪ lən; gəˈli nəs(n.)
Claudius,a .d . c130–c200, Greek physician and writer.
Greek anatomist whose theories formed the basis of European medicine until the Renaissance (circa 130-200)
An ancient Greek physician.
, of mostly American usage.
Origin: From the word γαλήνη, meaning calm or tranquil.
The Nuttall Encyclopedia
or Claudius Galenus, a famous Greek physician, born at Pergamus, in Illyria, where, after studying in various cities, he settled in 158; subsequently he went to Rome, and eventually became physician to the emperors M. Aurelius, L. Verus, and Severus; of his voluminous writings 83 treatises are still extant, and these treat on a varied array of subjects, philosophical as well as professional; for centuries after his death his works were accepted as authoritative in the matter of medicine (131-201).