- 【化】碘（元素符号 I）
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)
a tincture consisting of a solution of iodine in ethyl alcohol; applied topically to wounds as an antiseptic
Lack of iodine is a common cause of trouble.
Iodine tends to localize in the thyroid.
The nurse bathed his wound with iodine.
It smarts when iodine is put on a cut.