CK, Ck, or ck may refer to:
==Science and technology== Conductive keratoplasty, a type of refractive surgery Creatine kinase, an enzyme Cytokinin, a plant hormone Cytokeratin (CK1 to CK20), keratin proteins Cyanogen chloride, an inorganic chemical
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).