Cy, CY, or cy may refer to:
Cyprus (; Greek: Κύπρος, translit. Kýpros IPA: [ˈcipros]; Turkish: Kıbrıs IPA: [ˈkɯbɾɯs]), officially the Republic of Cyprus (Greek: Κυπριακή Δημοκρατία, translit.
Cystic fibrosis (CF) is a genetic disorder that affects mostly the lungs, but also the pancreas, liver, kidneys, and intestine.
Cyber crime, or computer related crime, is crime that involves a computer and a network. The computer may have been used in the commission of a crime, or it may be the target.
Cynthia Ann Stephanie "Cyndi" Lauper (born June 22, 1953) is an American singer, songwriter, actress and LGBT rights activist.
Cycling, also called bicycling or biking, is the use of bicycles for transport, recreation, exercise or sport.
Cyrus II of Persia (Old Persian: 𐎤𐎢𐎽𐎢𐏁 Kūruš; New Persian: کوروش Kuruš; Hebrew: כֹּרֶשׁ Koresh; c. 600 – 530 BC), commonly known as Cyrus the Great and also called Cyrus the Elder by the Greeks, was the founder of the Achaemenid Empire.
Cytochromes P450 (CYPs) are proteins of the superfamily containing heme as a cofactor and, therefore, are hemoproteins.