iodine meaning and definition

IODINE noun

Definition of iodine (noun)

1. 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: atomic number 53, I, iodin
2. a tincture consisting of a solution of iodine in ethyl alcohol; applied topically to wounds as an antiseptic
   • synonyms: tincture of iodine