Cy, CY, or cy may refer to:
Cyprus ( (listen); Greek: Κύπρος [ˈcipros]; Turkish: Kıbrıs [ˈkɯbɾɯs]), officially the Republic of Cyprus (Greek: Κυπριακή Δημοκρατία, lit.
Cystic fibrosis (CF) is a genetic disorder that affects mostly the lungs, but also the pancreas, liver, kidneys, and intestine.
Cybercrime, or computer-oriented crime, is a 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.
Cyanobacteria , also known as Cyanophyta, are a phylum of bacteria that obtain their energy through photosynthesis and are the only photosynthetic prokaryotes able to produce oxygen.
Cynthia Ann Stephanie Lauper (born June 22, 1953) is an American singer, songwriter, actress and activist.
The Cyrillic script () is a writing system used for various alphabets across Eurasia and is used as the national script in various Slavic-, Turkic- and Persian-speaking countries in Eastern Europe, the Caucasus, Central Asia, and North Asia.
Cycling, also called biking or bicycling, is the use of bicycles for transport, recreation, exercise or sport.
Cyproterone acetate (CPA), sold alone under the brand name Androcur or with ethinylestradiol under the brand names Diane or Diane-35 among others, is an antiandrogen and progestin medication which is used in the treatment of androgen-dependent conditions like acne, excessive hair growth, early puberty, and prostate cancer, as a component of feminizing hormone therapy for transgender women, and in birth control pills.