C14, C.XIV or C-14 may refer to:
==Science and technology== IEC 60320 C14, a polarised, three pole socket electrical connector Malignant neoplasm of other and ill-defined sites in the lip, oral cavity and pharynx (ICD-10 code), a head and neck cancer Caldwell 14, in the constellation Perseus Carbon-14 (C), a radioactive isotope of carbon C-14 dating, a method for dating events
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).