# iodide

/ˈaɪəˌdaɪd/ (US) · /ˈaɪədˌaɪd/ (UK) · CEFR C1 · Noun

Source: https://englishreference.com/word/iodide
Updated: 2026-10-19

## Definition

a chemical form of iodine that you find in some salts and medicines. Your thyroid needs it to stay healthy.

For teachers: a negatively charged ion of iodine (I-), or a salt or compound formed from iodine combined with another element.

## Examples

- This salt contains iodide for healthy thyroid function.
- The doctor prescribes potassium iodide tablets to protect the thyroid after radiation exposure.
- Although seawater naturally contains trace iodide, manufacturers fortify table salt with potassium iodide to prevent iodine deficiency across inland populations.

---

From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.