/puy"seez, pis"eez/ , n., gen. Piscium /pish"ee euhm/ , for 1.
1. Astron. the Fishes, a zodiacal constellation between Aries and Aquarius.
2. Astrol.
a. the twelfth sign of the zodiac: the mutable water sign. See illus. under zodiac .
b. a person born under this sign, usually between February 19th and March 20th.
3. the class of vertebrates comprising the fish and sometimes including, in certain classifications, the cyclostomes.
[ pisces, pl. of piscis FISH ]