Pronunciation: (pī'sēz, pis'ēz), [key]
—gen. Pis•ci•umPronunciation: (pish'ē-um), [key] for 1.
1. Astron.the Fishes, a zodiacal constellation between Aries and Aquarius.
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.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.