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

A single layer of silver iodide was placed between two sheets of graphene, forming a protective "sandwich."

From Science Daily • Jan. 26, 2026

Traditionally, cloud-seeding operations flew planes into clouds and used flares that contained silver iodide.

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, that can wash pollutants from the air.

From Barron's • Nov. 2, 2025

But maybe his fatigue is exacerbated by the potassium iodide he's taking.

From "Vincent and Theo: The Van Gogh Brothers" by Deborah Heiligman