1. [ noun ] (chemistry) 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)
Synonyms: I atomic_number_53 iodin
Related terms: chemical_element halogen iodine-131 iodine-125 seawater iodize
2. [ noun ] (medicine,pharmacology) a tincture consisting of a solution of iodine in ethyl alcohol; applied topically to wounds as an antiseptic
Synonyms: tincture_of_iodine
Related terms: tincture antiseptic
Similar spelling:   iodin