Etymology
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ion (n.)

1834, introduced by English physicist and chemist Michael Faraday (suggested by the Rev. William Whewell, English polymath), coined from Greek ion, neuter present participle of ienai "go," from PIE root *ei- "to go." So called because ions move toward the electrode of opposite charge.

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-on 

subatomic particle suffix, from ion.

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indirection (n.)

"irregular means, deceitful action," 1590s, from indirect + -ion.

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ionic (adj.)

"pertaining to ions," 1890, from ion + -ic.

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flocculation (n.)

"the union of small particles into granular aggregates," 1875, from flocculate + -ion.

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-ation 

the end of some nouns of action; see -ate + -ion.

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prospection (n.)

"act of looking forward or into the distance," 1660s; see prospect (n.) + -ion.

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levitation (n.)

1660s, noun of action from Latin levitas "lightness" (see levitate) + -ion.

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exertion (n.)

1660s, "act of exerting," from exert + -ion. Meaning "vigorous action or effort" is from 1777.

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