noun, verb ·Moderate ·College level

Definitions

Noun

1. 1
   A chemical element (symbol: I) with an atomic number of 53; one of the halogens. uncountable, usually
2. 2
   a tincture consisting of a solution of iodine in ethyl alcohol; applied topically to wounds as an antiseptic wordnet
3. 3
   An antiseptic incorporating the element. uncountable, usually
4. 4
   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) wordnet
5. 5
   An iodide. countable, obsolete, uncountable, usually

Verb

1. 1
   to treat with iodine. transitive

Synonyms

All synonyms

tincture of iodinetincture of iodinealcoholantisepticargyrolatomic number 53

Example

More examples

"Fluorine, chlorine, bromine, iodine and astatine are halogens."

Etymology

From French iode + -ine, from Ancient Greek ἰοειδής (ioeidḗs, “violet”). Coined by British chemist Humphry Davy in 1814.

Related phrases

Lugol's iodinecadexomer iodineeka-iodineiodine bushiodine cyanideiodine greeniodine heptafluorideiodine indexiodine monobromideiodine monochlorideiodine numberiodine pentafluoride

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.