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ephedrine a drug used to treat respiratory ailments such as asthma or nasal congestion.
ephemeral lasting for only a short period. [3 definitions]
ephemerid see "mayfly."
ephemeris a table or a collection of tables giving the projected positions of celestial bodies for every day of a certain period.
Ephesians a book of the New Testament, consisting of a letter written by the apostle Paul to the Christians of Ephesus.
ephod a richly embroidered vestment worn by the Jewish clergy in ancient times.
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.