||A*qua"ri*us (?), n. [L. aquarius,
adj., relating to water, and n., a water-carrier, fr. aqua. See
Aqua.] (Astron.) (a) The Water-bearer;
the eleventh sign in the zodiac, which the sun enters about the 20th of
January; -- so called from the rains which prevail at that season in Italy
and the East. (b) A constellation south of
Pegasus.