\Chal*de"an\, a. [L. Chaldaeus.]
Of or pertaining to Chaldea. -- n.
(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.