Pisces
noun
Pi·sces ˈpī-(ˌ)sēz 
also
ˈpi-ˌsēz or
ˈpis-ˌkās plural in form but singular in construction
1
: a zodiacal constellation directly south of Andromeda
2
a
: the 12th sign of the zodiac in astrology see Signs of the Zodiac Table
b
: one born under this sign
Word History
Etymology
Middle English, from Latin (genitive Piscium), from plural of piscis fish — more at fish
First Known Use
before the 12th century, in the meaning defined at sense 2
Kids Definition
Pisces
noun
Pi·sces ˈpī-sēz
1
: a constellation between Aquarius and Aries imagined as two fish
2
: the twelfth sign of the zodiac or a person born under this sign
Medical Definition
Pisces
noun plural
Pis·ces
ˈpī-ˌsēz also ˈpi-
in some classifications
: a class of vertebrates comprising all the fishes and sometimes the cyclostomes and lancelets