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English Words Starting With E

4,896 entries — pick a word to see its definition, pronunciation, and usage.

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Noun Verb Adjective Adverb Plural noun Suffix Combining form Verb (transitive)Verb (intransitive)Verb (ambitransitive)

epicycloid
nounLow
/ˌɛpɪˈsʌɪklɔɪd/A plane curve traced by a point on the circumference of a circle that rolls without slipping around the outside of a fixed circle.
epicycloidal gear
nounLow/Very Technical
/ˌɛpɪˌsʌɪˈklɔɪd(ə)l ɡɪə/A gear system where one or more planet gears rotate around a central sun gear while also orbiting it, creating complex rotational motion.
epicycloidal wheel
nounVery low
/ˌɛpɪsaɪˈklɔɪdəl ˈwiːl/A specific gear wheel whose teeth are formed along an epicycloidal curve, used in gearing systems to ensure smooth engagement and rolling action.
epidaurus
nounC2
/ˌɛpɪˈdɔːrəs/A significant archaeological site and ancient city in Greece, famous for its theatre and sanctuary of Asclepius.
epidemic
adjectivenounB2
/ˌepɪˈdemɪk/A widespread occurrence of an infectious disease in a community at a particular time.
epidemic encephalitis
nounC2
/ˌɛpɪˈdɛmɪk ɛnˌsɛfəˈlaɪtɪs/An acute inflammatory disease of the brain, often of viral origin, that occurs in outbreaks affecting many individuals in a population at the same time.
epidemic meningitis
nounC2
/ˌɛpɪˈdɛmɪk ˌmɛnɪnˈdʒaɪtɪs/A sudden widespread outbreak of the inflammatory disease of the meninges in a community.
epidemic parotitis
nounC2
/ˌɛpɪˈdɛmɪk ˌpærəˈtaɪtɪs/A contagious viral disease characterized by painful swelling of the parotid salivary glands.
epidemiology
nounC1/C2
/ˌɛpɪˌdiːmiˈɒlədʒi/The scientific study of the distribution, patterns, and causes of health and disease conditions in defined populations.
epidendrum
nounRare/Very Low Frequency
/ˌɛpɪˈdɛndrəm/A genus of tropical and subtropical orchids, typically epiphytic (growing on trees).
epidermis
nounC1
/ˌɛpɪˈdɜːmɪs/The outermost layer of cells covering an organism, especially the skin of a vertebrate.
epidermolysis bullosa
nounC2 (Very Low Frequency)
/ˌɛpɪdəˌmɒlɪsɪs bʊˈləʊsə/A group of rare genetic skin conditions characterised by extremely fragile skin that blisters and tears from minor friction or trauma.
epidiascope
nounRare / Historical / Technical
/ˌɛpɪˈdaɪəskəʊp/An optical projector used to display images of opaque objects or transparent slides onto a screen.
epididymis
nounVery Low
/ˌɛpɪˈdɪdɪmɪs/A tightly coiled tube situated at the back of the testicle, where sperm mature and are stored.
epididymitis
nounVery Low
/ˌep.ɪˌdɪd.ɪˈmaɪ.tɪs/A medical condition characterized by inflammation of the epididymis, a coiled tube at the back of the testicle.
epidiorite
nounC2
/ˌɛpɪˈdaɪəraɪt/A metamorphic rock, specifically a diorite that has been altered by metamorphism.
epidote
nounC2
/ˈɛpɪdəʊt/A greenish mineral commonly found in metamorphic rocks.
epidural
adjectivenounC1
/ˌɛpɪˈdjʊər(ə)l/An injection of anaesthetic into the space around the spinal cord to numb the lower body, most commonly used for pain relief during childbirth or surgery.
epidural anesthesia
nounC1
/ˌɛpɪˈdjʊərəl ˌænɪsˈθiːzɪə/A regional anesthesia technique in which anesthetic drugs are injected into the epidural space of the spinal cord, blocking pain sensation in a specific region of the body, commonly used during childbirth.
epifauna
nounC2
/ˌɛpɪˈfɔːnə/Animals that live on the surface of a substrate, such as the seafloor, rocks, or other organisms.

Showing 2821–2840 of 4896 words.