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)

Similar word(s): iodin

Definition categories: substance, element, halogen

2. a tincture consisting of a solution of iodine in ethyl alcohol; applied topically to wounds as an antiseptic

Definition categories: man–made, antiseptic, tincture

verb

1. (transitive) To treat with iodine.