definition of
iodine

[1] #1 iodine n. [iodin, I, atomic number 53] 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). wn

[2] #2 iodine n. [tincture of iodine] a tincture consisting of a solution of iodine in ethyl alcohol; applied topically to wounds as an antiseptic. wn