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epi- on; upon. [3 definitions]
epiblast the outer layer of cells of a developing embryo that later becomes the ectoderm, but that also contains cells capable of becoming the mesoderm or endoderm. [2 definitions]
epic referring or pertaining to a long poem that celebrates a hero or heroes and recounts their deeds in a grand style. [5 definitions]
epicalyx in certain flowers, a ring of small modified leaves resembling the calyx.
epicanthus a fold of skin covering the inner corner of the eye, common in many Asiatic peoples, and also occurring in some abnormal conditions such as Down's syndrome.
epicardium the inner layer of the thin membranous sac that surrounds the heart. (See pericardium.)
epicarp the outer layer of a fruit's pericarp, such as a rind or peel.
epicene sharing the traits of both sexes. [3 definitions]
epicenter the point on the earth's surface directly above the central source of an earthquake.
epicure a person who has cultivated tastes, as in food or wine; connoisseur.
epicurean having a desire and taste for sensuous luxury, esp. in food and drink. [4 definitions]
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]