Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of mediums is as below...

Mediums :: Mediums (pl. ) of Mediu.

Dioptrics :: Dioptrics (n.) The science of the refraction of light; that part of geometrical optics which treats of the laws of the refraction of light in passing from one medium into another, or through different mediums, as air, water, or glass, and esp. through different lenses; -- distinguished from catoptrics, which refers to reflected light..

Diacoustics :: Diacoustics (n.) That branch of natural philosophy which treats of the properties of sound as affected by passing through different mediums; -- called also diaphonics. See the Note under Acoustics.

Intermediums :: Intermediums (pl. ) of Intermediu.

Spiritualist :: Spiritualist (n.) One who believes in direct intercourse with departed spirits, through the agency of persons commonly called mediums, by means of physical phenomena; one who attempts to maintain such intercourse; a spiritist..

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