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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)

endorsement
nounC1
/ɪnˈdɔːsmənt/An act of giving one's public approval or support to someone or something.
endosarc
nounVery Rare (Obscure Technical Term)
/ˈɛndəʊˌsɑːk/The inner, fluid or granular portion of the cytoplasm in certain protozoans and single-celled organisms.
endoscope
nounLow
/ˈɛn.dəˌskəʊp/A medical instrument consisting of a flexible or rigid tube with a light and camera, used to examine the interior of a hollow organ or cavity of the body.
endoscopy
nounC1
/enˈdɒs.kə.pi/A medical procedure using an endoscope (a flexible tube with a light and camera) to look inside the body.
endoskeleton
nounLow
/ˌɛndəʊˈskɛlɪt(ə)n/The internal skeleton or supporting framework within the body of an animal, made of bone and/or cartilage.
endosmosis
nounVery low (technical/scientific)
/ˌɛndɒzˈməʊsɪs/the inward flow of a fluid through a semipermeable membrane into a solution of higher concentration
endosome
nounC1
/ˈɛndə(ʊ)səʊm/A membrane-bound compartment inside a eukaryotic cell, formed by the inward budding of the plasma membrane during endocytosis, serving to sort and transport internalized material.
endosperm
nounC2
/ˈen.dəʊ.spɜːm/The tissue inside a seed that provides nutrition for the developing plant embryo.
endospore
nounLow
/ˈɛndə(ʊ)ˌspɔː/A tough, dormant, and resistant structure formed by some bacteria (e.g., Bacillus, Clostridium) to survive harsh environmental conditions.
endosporium
nounC2
/ˌɛndəʊˈspɔːrɪəm/The inner, more delicate layer of the wall of a spore, found especially in fungi and some bacteria.
endostatin
nounVery Low
/ˌɛndəʊˈstætɪn/A naturally occurring protein fragment that inhibits the formation of new blood vessels (angiogenesis).
endosteum
nounC2 (Specialist)
/ɛnˈdɒstɪəm/The thin vascular membrane that lines the inner surface of long bones and other medullary cavities
endostosis
nounC2+
/ˌɛndɒˈstəʊsɪs/The process of bone formation occurring within cartilage or connective tissue.
endostyle
nounVery Low (C2)
/ˈɛndə(ʊ)ˌstʌɪl/A glandular groove in the pharynx of some invertebrate chordates and larval lampreys, involved in filter-feeding.
endosulfan
nounVery Low
/ˌɛndə(ʊ)ˈsʌlfæn/A highly toxic, synthetic organochlorine insecticide and acaricide.
endosymbiont
nounVery Low / Specialized
/ˌɛndəʊˈsɪmbaɪɒnt/An organism that lives within the body or cells of another organism in a symbiotic relationship.
endosymbiosis
nounC2
/ˌɛndəʊsɪmbaɪˈəʊsɪs/A type of symbiotic relationship in which one organism lives inside the cells or body of another.
endothecium
nounVery Low (C2)
/ˌɛndəʊˈθiːsɪəm/The inner layer of the anther wall in a flower, which aids in pollen release.
endothelioma
nounVery Low / Specialist
/ˌɛndə(ʊ)ˌθiːlɪˈəʊmə/A tumour arising from the endothelium, the thin layer of cells lining blood vessels, lymphatics, or body cavities.
endothelium
nounC2
/ˌɛndəʊˈθiːliəm/A thin layer of cells that lines the interior surface of blood vessels and lymphatic vessels.

Showing 2221–2240 of 4896 words.