iodine | | |
n. (substance) | 1. atomic number 53, i, iodin, iodine | 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). |
| ~ chemical element, element | any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter. |
| ~ iodine-131 | heavy radioactive isotope of iodine with a half-life of 8 days; used in a sodium salt to diagnose thyroid disease and to treat goiter. |
| ~ iodine-125 | light radioactive isotope of iodine with a half-life of 60 days; used as a tracer in thyroid studies and as a treatment for hyperthyroidism. |
| ~ halogen | any of five related nonmetallic elements (fluorine or chlorine or bromine or iodine or astatine) that are all monovalent and readily form negative ions. |
| ~ brine, saltwater, seawater | water containing salts.; "the water in the ocean is all saltwater" |
n. (artifact) | 2. iodine, tincture of iodine | a tincture consisting of a solution of iodine in ethyl alcohol; applied topically to wounds as an antiseptic. |
| ~ antiseptic | a substance that destroys micro-organisms that carry disease without harming body tissues. |
| ~ tincture | (pharmacology) a medicine consisting of an extract in an alcohol solution. |
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