Inherited from Proto-Italic *piskis. Cognates include Old Irish íasc, Gothic 𐍆𐌹𐍃𐌺𐍃 (fisks) and Old English fisċ (English fish).

• (Classical Latin) IPA^(key): [ˈpɪs.kɪs]
• (modern Italianate Ecclesiastical) IPA^(key): [ˈpiʃ.ʃis]

piscis m (genitive piscis); third declension

1. fish

The singular form may also be used as a collective noun.

Third-declension noun (i-stem).

• Piscis (“Piscis Austrinus (constellation)”, literally “the Fish”)
• Piscēs (“Pisces (constellation)”, literally “the Fishes”)
• *porcopiscis m (“(i.e., porcus + piscis) pig-fish, porpoise”) (Vulgar Latin)

• “piscis”, in Charlton T. Lewis and Charles Short (1879), A Latin Dictionary, Oxford: Clarendon Press
• “piscis”, in Charlton T. Lewis (1891), An Elementary Latin Dictionary, New York: Harper & Brothers
• "piscis", in Charles du Fresne du Cange, Glossarium Mediæ et Infimæ Latinitatis (augmented edition with additions by D. P. Carpenterius, Adelungius and others, edited by Léopold Favre, 1883–1887)
• “piscis”, in Gaffiot, Félix (1934), Dictionnaire illustré latin-français, Hachette.
• Carl Meißner; Henry William Auden (1894), Latin Phrase-Book‎^[1], London: Macmillan and Co.
  • to live on meat, fish, by plunder: vivere carne, piscibus, rapto (Liv. 7. 25)
    

piscis (invariable)

1. born under the zodiac sign Pisces

• “piscis”, in Diccionario de la lengua española [Dictionary of the Spanish Language] (in Spanish), online version 23.8.1, Royal Spanish Academy [Spanish: Real Academia Española], 15 December 2025