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[ahy-uh-dahyd, -did] /ˈaɪ əˌdaɪd, -dɪd/
noun, Chemistry
a salt of hydriotic acid consisting of two elements, one of which is iodine, as sodium iodide, NaI.
a compound containing iodine, as methyl iodide.
Origin of iodide
1815-25; iod- + -ide
Related forms
subiodide, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for iodide
  • Hydrogen peroxide reduces other chemicals into iodide ions.
  • Desperate people have tried everything from firing cannons into the sky to lacing clouds with silver iodide.
  • Chronic exposure to perchlorate can dampen the thyroid's ability to absorb iodide and produce hormones.
  • Too much or too little iodide can cause hypothyroidism.
  • Goiters may also develop in people with iodide deficiency.
British Dictionary definitions for iodide


a salt of hydriodic acid, containing the iodide ion, I
a compound containing an iodine atom, such as methyl iodide, CH3I
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for iodide

from comb. form of iodine + -ide.

Online Etymology Dictionary, © 2010 Douglas Harper
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iodide in Medicine

iodide i·o·dide (ī'ə-dīd')
A compound of iodine with a more electropositive element or group.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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iodide in Science
A chemical compound consisting of iodine together with another element or radical.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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