Webster's Revised Unabridged Dictionary · 1913

Chaldean

Chaldean , adjective

[Latin Chaldaeus.]

Of or pertaining to Chaldea.
(a)
A native or inhabitant of Chaldea.
(b)
A learned man, esp. an astrologer; -- so called among the Eastern nations, because astrology and the kindred arts were much cultivated by the Chaldeans.
(c)
Nestorian.