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Epicurus a Greek philosopher (342?-270 B.C.).
epicycle in early astronomy, a small circle whose center moves along the circumference of a larger circle. [2 definitions]
epidemic spreading rapidly to a great many individuals in a locality, as a contagious disease. [4 definitions]
epidemiology the scientific study of the causes, spread, and containment of diseases within populations.
epidermis the outer, nonsensitive layer of skin. [2 definitions]
epidermoid of or resembling the outer layer of the skin.
epigenetic of or pertaining to a heritable change in gene function that does not involve a change in DNA sequence.
epigenetics the study of heritable changes in gene function that do not involve a change in DNA sequence.
epiglottis a thin, flexible plate of cartilage at the root of the tongue that, by closing over the glottis, prevents food from entering the windpipe during swallowing.
epigram a short, pithy, often paradoxical sentence. [2 definitions]
epigrammatize to express (an idea, wish, or the like) in the form of an epigram.
epigraph an inscription, esp. when engraved in stone or on a building. [2 definitions]
epigraphic of or related to epigraphs or epigraphy. [2 definitions]
epigraphy the study or deciphering of inscriptions, esp. on ancient coins, stones, and the like. [2 definitions]
epigynous of certain flowers, having all parts attached at or near the top of the ovary.
epilepsy a nervous system disorder that causes repeated lapses in physical or mental function, often including convulsions and unconsciousness.
epileptic of or indicating epilepsy. [3 definitions]
epilimnion the layer of the water of a lake, above the thermocline, that is warmest and contains the most oxygen. (Cf. hypolimnion.)
epilogue a short concluding section to a literary work, often summarizing what later becomes of the characters. [2 definitions]
epinephrine a hormone produced by the adrenal gland that stimulates muscle tissue and raises blood pressure; adrenaline. [2 definitions]
epiphany (cap.) a Christian celebration on January 6 of the revelation of the divinity of Jesus Christ to the Magi. [3 definitions]