noun · verb · 6 senses · updated from the 2026-07-25 local source snapshot
Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
Sound
Pronunciation
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ī'ədīn
ī'ədĭn
ī'ədēn
/ˈaɪ.əˌdaɪn
-dɪn
-diːn/
UK:Recorded audio is listed in the source snapshot.
General-American:Recorded audio is listed in the source snapshot.
US:Recorded audio is listed in the source snapshot.
CMU ARPABET:AY1 AH0 D AY2 N
Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.
1
noun
Meaning 1
A chemical element (symbol: I) with an atomic number of 53; one of the halogens.
Definition source: English Wiktionary via Wiktextract
Usage: uncountable, usually
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: iode
Antonyms: none provided
2
noun
Meaning 2
An antiseptic incorporating the element.
Definition source: English Wiktionary via Wiktextract
Usage: uncountable, usually
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: tincture of iodine
Antonyms: none provided
3
noun
Meaning 3
An iodide.
Definition source: English Wiktionary via Wiktextract
Usage: countable, obsolete, uncountable, usually
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
4
verb
Meaning 4
to treat with iodine.
Definition source: English Wiktionary via Wiktextract
Usage: transitive
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: iodinate
Antonyms: none provided
5
noun
Meaning 5
a tincture consisting of a solution of iodine in ethyl alcohol; applied topically to wounds as an antiseptic
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: tincture of iodine
Antonyms: none provided
Broader terms: antiseptic, tincture
6
noun
Meaning 6
a nonmetallic element belonging to the halogens; used especially in medicine and photography and in dyes; occurs naturally only in combination in small quantities (as in sea water or rocks)
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: iodin, I, atomic number 53
Antonyms: none provided
Broader terms: chemical element, element, halogen
Narrower terms: iodine-131, iodine-125
History
Etymology
From French iode + -ine, from Ancient Greek ἰοειδής (ioeidḗs, “violet”). Coined by British chemist Humphry Davy in 1814.
Across languages
Translations
119 source translations are retained for this English entry.