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Medical Word Parts - Letter: e
| Term | Definition |
| ec- | outside, out |
| echin/o | spiny, prickly |
| echo- | reflected sound |
| eco- | environment |
| -ectasis | dilation, stretching |
| ecto- | out, outward |
| -ectomy | removal, excision |
| ectr/o | congenital absence |
| -edema | swelling |
| ele/o | oil |
| electro/o | electricity |
| embryo- | related to embryo |
| -emesis | vomiting |
| -emia | condition of the blood |
| emmetr/o | correct measure |
| en- | in, within |
| enanti/o | opposed, opposite |
| encephal/o | brain |
| end- | within, inner |
| endo- | within |
| endocardi/o | endocardium (inner lining of the heart) |
| endometri/o | endometrium (mucous membrane lining the uterus) |
| ent- | within, inside |
| enter/o | small intestines |
| eosin/o | rose-colored |
| epi- | above, on, following |
| epididym/o | epididymis (structure within the scrotum that stores sperm) |
| epiglott/o | epiglottis (cartilage that prevents food from entering the trachea) |
| episi/o | vulva |
| epitheli/o | epithelium |
| equi- | equal |
| erethism/o | irritation |
| erg- | work |
| ergo- | work, energy |
| erythr/o | red |
| erythrocyt/o | red blood cell |
| eschar/o | scab |
| eso- | inward |
| esophag/o | esophagus |
| esthes/o | nerve sensation, feeling |
| -esthesia | sensation, feeling |
| eti/o | cause |
| eu- | normal, good |
| eury- | wide, broad |
| ex- | out, away from |
| exo- | outside, outward |
| extra- | outside of, beyond |
