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The Collaborative International Dictionary
Cation

Cation \Cat"i*on\, n. [Gr. ? downward + ? going, p. pr. of ? to go.] (Chem.) a positively charged atom, radical, or molecule, which in electrolysis migrates to the cathode; a positive ion; -- opposed to anion.
--Faraday.

Douglas Harper's Etymology Dictionary
cation

1834, from Greek kation "going down," neuter present participle of katienai "to go down," from kata "down" (see cata-) + ienai "to go" (see ion). Proposed by the Rev. William Whewell (1794-1866), English polymath, and published by English physicist Michael Faraday.

Wiktionary
cation

n. 1 (context chemistry English) A positively charged ion—opposed to anion. 2 (context chemistry English) The ion in an electrolyzed solution that migrates to the cathode.

WordNet
cation

n. a positively charged ion

Usage examples of "cation".

Lest the quiet give way to fresh alter cation, Lysaer delivered his solution.

Even a spell-turned cation to his Name failed to raise any flicker of awareness.

More words of invo cation, the symmetry of each syllable fluid as liquid light.

His aide Cation moved back out of sight and reappeared moments later with a bucket of water.

Then the barrel was strapped into place, and lastly Rael and Cation connected the golden wires from the power unit.

He, Cation and Mejana walked along the ramparts, then down the last set of steps before the gaping hole in the wall.

The thin air between them was no barrier to communi cation between Keff and the Frog Prince.

On top of that, he's giving us access to UMC communi cations resources.

Trapped in his strongroom, completely dependent on his communi cations network, he would have no idea what was hap pening.

The communi cations officer was in the compartment before he could push the proper button.

Finally, an cation of other black box assembled all the data, the lo airplane the sources of thermal radiation, and its probable cause, and caused the on-board printing device to print a map on which was located the location of the airerafi and the sources of the radiation There were little symbols identifying the .