What does iodine mean?

Definitions for iodine
ˈaɪ əˌdaɪn, -dɪn; in Chem. also -ˌdin; -dɪnio·dine

This dictionary definitions page includes all the possible meanings, example usage and translations of the word iodine.

Princeton's WordNet

  1. iodine, iodin, I, atomic number 53noun

    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)

  2. tincture of iodine, iodinenoun

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


  1. iodinenoun

    A chemical element (symbol: I) with an atomic number of 53; one of the halogens.

  2. iodinenoun

    An antiseptic incorporating the element.

  3. iodinenoun

    An iodide.

  4. Etymology: From iode, from ἰοειδής + -ine


  1. Iodine

    Iodine is a chemical element with the symbol I and atomic number 53. The heaviest of the stable halogens, it exists as a semi-lustrous, non-metallic solid at standard conditions that melts to form a deep violet liquid at 114 °C (237 °F), and boils to a violet gas at 184 °C (363 °F). The element was discovered by the French chemist Bernard Courtois in 1811 and was named two years later by Joseph Louis Gay-Lussac, after the Ancient Greek Ιώδης 'violet-coloured'. Iodine occurs in many oxidation states, including iodide (I−), iodate (IO−3), and the various periodate anions. It is the least abundant of the stable halogens, being the sixty-first most abundant element. As the heaviest essential mineral nutrient, iodine is required for the synthesis of thyroid hormones. Iodine deficiency affects about two billion people and is the leading preventable cause of intellectual disabilities.The dominant producers of iodine today are Chile and Japan. Due to its high atomic number and ease of attachment to organic compounds, it has also found favour as a non-toxic radiocontrast material. Because of the specificity of its uptake by the human body, radioactive isotopes of iodine can also be used to treat thyroid cancer. Iodine is also used as a catalyst in the industrial production of acetic acid and some polymers. It is on the World Health Organization's List of Essential Medicines.


  1. iodine

    Iodine is a chemical element with an atomic number of 53 on the periodic table. It is a dark grey or purple-black, lustrous, non-metal solid at room temperature. It is the heaviest member of the halogen group and primarily used in medicine, photography and dyes. Its ability to kill various types of microorganisms such as bacteria, viruses, and fungi makes it an important component in disinfectants. Notably, it is also essential to human nutrition, as it is a key component in thyroid hormones.

Webster Dictionary

  1. Iodinenoun

    a nonmetallic element, of the halogen group, occurring always in combination, as in the iodides. When isolated it is in the form of dark gray metallic scales, resembling plumbago, soft but brittle, and emitting a chlorinelike odor. Symbol I. Atomic weight 126.5. If heated, iodine volatilizes in beautiful violet vapors

  2. Etymology: [Gr. 'iw`dhs violetlike; 'i`on a violet + e'i^dos form: cf. F. iode, iodine. The name was given from the violet color of its vapor. See Violet, Idyl.]


  1. Iodine

    Iodine is a chemical element with symbol I and atomic number 53. The name is from Greek ἰοειδής ioeidēs, meaning violet or purple, due to the color of elemental iodine vapor. Iodine and its compounds are primarily used in nutrition, and industrially in the production of acetic acid and certain polymers. Iodine's relatively high atomic number, low toxicity, and ease of attachment to organic compounds have made it a part of many X-ray contrast materials in modern medicine. Iodine has only one stable isotope. A number of iodine radioisotopes are also used in medical applications. Iodine is found on Earth mainly as the highly water-soluble iodide ion, I−, which concentrates it in oceans and brine pools. Like the other halogens, free iodine occurs mainly as a diatomic molecule I2, and then only momentarily after being oxidized from iodide by an oxidant like free oxygen. In the universe and on Earth, iodine's high atomic number makes it a relatively rare element. However, its presence in ocean water has given it a role in biology. It is the heaviest essential element utilized widely by life in biological functions. Iodine's rarity in many soils, due to initial low abundance as a crust-element, and also leaching of soluble iodide by rainwater, has led to many deficiency problems in land animals and inland human populations. Iodine deficiency affects about two billion people and is the leading preventable cause of intellectual disabilities.

Chambers 20th Century Dictionary

  1. Iodine

    ī′o-din, n. one of the four non-metallic elements, so named from the violet colour of its vapour.—n. I′odāte, a combination of iodic acid with a salifiable base.—adj. Iod′ic, containing iodine.—n. I′odīde, a binary compound of iodine.—adj. Iodif′erous, yielding iodine.—n. I′odism, a morbid condition due to iodine.—v.t. I′odīze, to treat with iodine: to impregnate with iodine, as collodion.—n. Iod′oform, a lemon-yellow crystalline substance, having a saffron-like odour and an unpleasant iodine-like taste.—adj. Iodomet′ric (chem.), measured by iodine.—ns. I′odure, Iod′ūret, a compound of iodine with a simple base; Iod′yrite, a yellowish mineral composed of iodine and silver. [Gr. ioeidēs, violet-coloured—ion, a violet, eidos, form.]

The Nuttall Encyclopedia

  1. Iodine

    a non-metallic element originally obtained from kelp, but now found in South America in combination with sodium, used largely both free and in combination in medicine and surgery, in photography, and in making aniline dyes.

U.S. National Library of Medicine

  1. Iodine

    A nonmetallic element of the halogen group that is represented by the atomic symbol I, atomic number 53, and atomic weight of 126.90. It is a nutritionally essential element, especially important in thyroid hormone synthesis. In solution, it has anti-infective properties and is used topically.

Dictionary of Nautical Terms

  1. iodine

    A substance chiefly obtained from kelp or sea-weed, extensively employed in medicine and the arts. Its vapour has a beautiful violet colour.

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  1. Chaldean Numerology

    The numerical value of iodine in Chaldean Numerology is: 5

  2. Pythagorean Numerology

    The numerical value of iodine in Pythagorean Numerology is: 2

Examples of iodine in a Sentence

  1. Katherine Zeratsky:

    Without the iodized salt, there are some people who may not get enough iodine in their diets.

  2. Mary Ellen:

    Some brown kelps, such as the sugar kelp grown in New England, are very high in iodine, they have so much iodine that consumers are advised to eat it no more than three times per week.

  3. Ashita Gupta:

    Worldwide, iodine deficiency is one of the causes ofan enlarged thyroid glandand hypothyroidism, however, iodine deficiency is rare in developed countries due to supplementation in table salt and certain foods such as dairy and bread.

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"iodine." Definitions.net. STANDS4 LLC, 2024. Web. 20 May 2024. <https://www.definitions.net/definition/iodine>.

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