| emanation | 1. Any substance that flows out or is emitted from a source or origin. 2. The radiation from a radioactive element. Origin: L. E-mano, pp. -atus, to flow out Actinium emanation, radon-219. Radium emanation, radon-222. Thorium emanation, radon-220. See: emanon. (05 Mar 2000) |
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| emanatorium | An institution where, formerly, radiation treatment now considered dangerous (using radioactive waters and the inhalation of radium emanations) was administered. (05 Mar 2000) |
| emancipation | In embryology, delimitation of a specific area in an organ-forming field, giving definite shape and limits to the organ primordium. (05 Mar 2000) |
| emanon | Archaic term once used to denote all radon isotopes collectively, when the term radon was restricted to the isotope radon-222, the naturally occurring intermediate of the uranium-238 radioactive series; so called because original names for radon-219, radon-220, and radon-222 were, respectively, "actinium emanation," "thorium emanation," and "radium emanation." Origin: L. Emano, to flow out + -on (05 Mar 2000) |
| emanotherapy | An obsolete treatment of various diseases by means of radium emanation (radon), or other emanation. (05 Mar 2000) |