EP, ep, or Ep may refer to:
A seizure, technically known as an epileptic seizure, is a brief episode of signs or symptoms due to abnormally excessive or synchronous neuronal activity in the brain.
Epistemology ( ( listen); from Greek ἐπιστήμη, epistēmē, meaning 'knowledge', and λόγος, logos, meaning 'logical discourse') is the branch of philosophy concerned with the theory of knowledge.Epistemology is the study of the nature of knowledge, justification, and the rationality of belief.
The Episcopal Church (TEC) is the United States-based member church of the worldwide Anglican Communion.
Epilepsy is a group of neurological disorders characterized by epileptic seizures. Epileptic seizures are episodes that can vary from brief and nearly undetectable periods to long periods of vigorous shaking.
The Epic of Gilgamesh () is an epic poem from ancient Mesopotamia that is often regarded as the earliest surviving great work of literature.
Epigenetics is the study of heritable phenotype changes that do not involve alterations in the DNA sequence.
Epidemiology is the study and analysis of the distribution (who, when, and where) and determinants of health and disease conditions in defined populations.
The Epstein–Barr virus (EBV), also called human herpesvirus 4 (HHV-4), is one of eight known human herpesvirus types in the herpes family, and is one of the most common viruses in humans.
Epithelium () is one of the four basic types of animal tissue, along with connective tissue, muscle tissue and nervous tissue.