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iodine

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i⋅o⋅dine

  [ahy-uh-dahyn, -din; in Chem. also ahy-uh-deen]
Use iodine in a Sentence
–noun Chemistry.
a nonmetallic halogen element occurring at ordinary temperatures as a grayish-black crystalline solid that sublimes to a dense violet vapor when heated: used in medicine as an antiseptic. Symbol: I; atomic weight: 126.904; atomic number: 53; specific gravity: (solid) 4.93 at 20°C.
Also, i⋅o⋅din  [ahy-uh-din] .

Origin:
1814; < F iode (< Gk īdēs, orig. rust-colored, but by folk etym. taken as í(on) violet + -ōdēs -ode 1 ) + -ine 2 ; introduced by H. Davy
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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i·o·dine   (ī'ə-dīn', -dĭn, -dēn')   
n.  

  1. Symbol I2 A lustrous, grayish-black, corrosive, poisonous halogen element having radioactive isotopes, especially I 131, used as a medical tracer and in thyroid disease diagnosis and therapy. Iodine compounds are used as germicides, antiseptics, and dyes. Atomic number 53; atomic weight 126.9045; melting point 113.5°C; boiling point 184.35°C; specific gravity (solid, at 20°C) 4.93; valence 1, 3, 5, 7. See Table at element.

  2. An antiseptic preparation containing iodine in solution, used to treat wounds.


[French iode, iodine (from Greek ioeidēs, violet-colored : ion, violet + -oeidēs, -oid) + -ine2.]
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Word Origin & History

iodine 
1814, formed by British chemist Sir Humphry Davy from Fr. iode "iodine," coined 1812 by Fr. chemist Joseph Louis Gay-Lussac from Gk. ioeides "violet-colored," from ion "violet" + eidos "appearance" (see -oid). So called from the color of the vapor given off when the crystals are heated.
Online Etymology Dictionary, © 2001 Douglas Harper
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Medical Dictionary

Main Entry: io·dine
Pronunciation: 'I-&-"dIn, -&d-&n, -&-"dEn
Function: noun
often attributive 1 : anonmetallic halogen element obtained usually as heavy shining blackish gray crystals and used especially in medicine (as in antisepsis and in the treatment of goiter and cretinism) and in photographyand chemical analysis —symbol I; —see ELEMENT table
2 : a tincture of iodine usedespecially as a topical antiseptic
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Medical Dictionary

iodine i·o·dine (ī'ə-dīn', -dĭn, -dēn')
n.


  1. Symbol I A poisonous halogen element having compounds used as germicides, antiseptics, and food supplements, with radioactive isotopes, especially I 131, used in thyroid disease diagnosis and therapy. Atomic number 53; atomic weight 126.9045; melting point 113.7°C; boiling point 184.4°C; specific gravity (solid, at 20°C) 4.93; valence 1, 3, 5, 7.

  2. A liquid containing iodine dissolved in ethyl alcohol, used as an antiseptic for wounds.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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