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endometrium the membrane that lines the uterus.
endomorphic of, relating to, or designating a heavy body type characterized by relative prominence of the abdomen and fatty tissues. (Cf. ectomorphic, mesomorphic.) [2 definitions]
endoplasm the inner, comparatively fluid part of the cellular material surrounding the nucleus. (Cf. ectoplasm.)
end organ any specialized receptor at the end of a sensory or motor nerve fiber.
endorphin one of several peptides secreted in the brain that have a tranquilizing, euphoric, or pain-relieving effect on the body.
endorse to approve or give support to. [2 definitions]
endorsement a statement given in support of a person or product, as in an advertisement or political campaign. [3 definitions]
endoscope a long, slender, tubular optical instrument inserted into an inner, hollow body part, such as the lungs or bowel, esp. for examination, diagnosis, or surgical treatment.
endoscopic of or relating to the use of a flexible fiber-optic instrument to examine an inner part of the body.
endoscopy a medical procedure, carried out for the purpose of examination, in which an endoscope, a long, tubular instrument with an attached camera, is inserted into the body, esp. through the throat or bowel.
endoskeleton the internal bony supporting framework characteristic of vertebrates. (Cf. exoskeleton.)
endosperm tissue that is derived from the embryo sac of a plant and that surrounds and nourishes the embryo.
endothelial of or pertaining to a layer of flat cells that lines blood vessels, lymphatic vessels, and some internal body cavities.
endothelium a layer of flat cells that lines blood vessels, lymphatic vessels, and some internal body cavities.
endothermic of, concerning, or characteristic of a chemical process accompanied or caused by absorption of heat. (Cf. exothermic.)
endow to give a permanent income, source of income, or property to. [2 definitions]
endowment the act of providing with a permanent fund or source of income, or the money so provided. [2 definitions]
endowment policy a type of insurance policy in which the insured receives a certain amount of money upon the policy's expiration, or the beneficiaries receive the money if the insured dies before the specified time.
end product the final or finished product, as of an industry, chemical reaction, or growth process.
end table a small table, usu. rectangular, placed at either end of a sofa or beside a chair.
endue to endow with some quality or characteristic.