PISCES

‖Pis″ces (?), n. pl. [[L. piscis a fish.]] 1. 1. (Astron.) (a) The twelfth sign of the zodiac, marked ♓ in almanacs. (b) A zodiacal constellation, including the first point of Aries, which is the vernal equinoctial point; the Fish.
2. 2. (Zoöl.) The class of Vertebrata that includes the fishes. The principal divisions are Elasmobranchii, Ganoidei, and Teleostei.