emanation

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em·a·na·tion

(em'ă-nā'shŭn),
1. Any substance that flows out or is emitted from a source or origin.
2. The radiation from a radioactive element.
[L. e- mano, pp. -atus, to flow out]

em·a·na·tion

(em'ă-nā'shŭn)
1. Any substance that flows out or is emitted from a source or origin.
2. The radiation from a radioactive element.
[L. e-mano, pp. -atus, to flow out]

emanation

(em-a-na'shun) [L. e, out, + manare, to flow]
1. Something given off; radiation; emission.
2. A gaseous product of radioactive disintegration.

actinium emanation

The radioactive gas given off by actinium; a radioactive isotope of actinium. Synonym: actinon

radium emanation

The radioactive gas given off by radium. Synonym: radon

thorium emanation

The radioactive gas given off by thorium. Synonym: thoron

emanation

that which is given off, such as a gaseous disintegration product given off from radioactive substances, or an effluvium.