Merriam-Webster's Collegiate® Dictionary, 11th Edition
EAGLE
I. noun
Etymology: Middle English egle, from Anglo-French egle, aigle, from Latin aquila
Date: 13th century
any of various large diurnal birds of prey (family Accipitridae) noted for their strength, size, keenness of vision, and powers of flight,
2. the eagle-bearing standard of the ancient Romans, one of a pair of eagle-bearing silver insignia of rank worn by a military colonel or a navy captain, a gold coin of the United States bearing an eagle on the reverse and usually having a value of ten dollars, a golf score of two strokes less than par on a hole, a member of a major fraternal order,
II. transitive verb (eagled; eagling)
Date: 1958
to score an eagle on (a golf hole)