/air"eez, -ee eez'/ , n., gen. Arietis /euh ruy"i tis/ .
1. Astron. the Ram, a zodiacal constellation between Pisces and Taurus.
2. Astrol.
a. the first sign of the zodiac: the cardinal fire sign. See illus. under zodiac .
b. a person born under this sign, usually between March 21st and April 19th.
[ 1350-1400; ME ]