iodide

American  

[ahy-uh-dahyd, -did] / ˈaɪ əˌdaɪd, -dɪd /

noun

Chemistry.

1. a salt of hydriodic acid consisting of two elements, one of which is iodine, as sodium iodide, NaI.

2. a compound containing iodine, as methyl iodide.

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iodide British  

/ ˈaɪəˌdaɪd /

noun

1. a salt of hydriodic acid, containing the iodide ion, I ^–

2. a compound containing an iodine atom, such as methyl iodide, CH 3 I

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iodide Scientific  

/ ī′ə-dīd′ /

1. A chemical compound consisting of iodine together with another element or radical.

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Other Word Forms

• subiodide noun

Etymology

Origin of iodide

First recorded in 1815–25; iod- + -ide ( def. )

Compare meaning

How does iodide compare to similar and commonly confused words? Explore the most common comparisons:

• iodide vs. iodine

Example Sentences

By combining advanced electron microscopy with neural networks, the team recorded a silver iodide crystal as it melted while being protected by layers of graphene.

From Science Daily • Jan. 26, 2026

Many studies have found that the small amount of silver iodide used doesn’t damage the environment.

From The Wall Street Journal • Dec. 4, 2025

While the US Environmental Protection Agency notes "limited" studies suggest silver iodide does not pose an environmental or health risk, it acknowledges the impact of more widespread use is "not known".

From Barron's • Nov. 2, 2025

On Tuesday, authorities used a Cessna aircraft to release fire flares containing silver iodide and sodium chloride into the atmosphere.

From BBC • Oct. 29, 2025

But in the event of a nuclear accident, people who may be exposed to iodine 131 can take potassium iodide tablets, which provide enough non-radioactive iodine 127 to saturate the thyroid.

From "Meltdown" by Deirdre Langeland