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

In this case, the researchers slightly rotated two stacked bilayers of chromium iodide relative to one another.

From Science Daily • Feb. 13, 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

Cloud seeding involves injecting chemical salts including silver or potassium iodide into clouds via aircraft or through generators on the ground.

From BBC • Nov. 16, 2025

Cloud seeding involves spraying particles such as silver iodide and salt into clouds from aircraft to trigger rain.

From Barron's • Nov. 16, 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