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iodoform
iodometry
iodophor
iodopsin
iolite
IOM
-ion
ion
ion channel
ion engine
ion exchange
ion implantation
ion pair
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ion rocket
ion source
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ion channel
i·on chan·nel (plural i·on chan·nels)


noun 
Definition:
 
controlled opening in a cell membrane: a channel in a cell membrane that opens or closes so as to control the passage of sodium, potassium, calcium, or chloride ions in solution
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