Webster's Revised Unabridged Dictionary · 1913

Babylonian

Babylonian ({not transcribed}) , adjective

Of or pertaining to the real or to the mystical Babylon, or to the ancient kingdom of Babylonia; Chaldean.

Babylonian , proper noun

1.
An inhabitant of Babylonia (which included Chaldea); a Chaldean.
2.
An astrologer; -- so called because the Chaldeans were remarkable for the study of astrology.