Usually means: Dense, silvery metal; highly corrosion-resistant.
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We found 38 dictionaries that define the word iridium:

General (23 matching dictionaries)
  1. iridium: Merriam-Webster
  2. iridium: Oxford Learner's Dictionaries
  3. iridium: American Heritage Dictionary of the English Language
  4. iridium: Collins English Dictionary
  5. iridium: Vocabulary.com
  6. Iridium, iridium: Wordnik
  7. iridium: Cambridge Advanced Learner's Dictionary
  8. iridium: Wiktionary
  9. iridium: Webster's New World College Dictionary, 4th Ed.
  10. iridium: The Wordsmyth English Dictionary-Thesaurus
  11. iridium: Infoplease Dictionary
  12. iridium: Dictionary.com
  13. iridium: Online Etymology Dictionary
  14. Iridium (disambiguation), Iridium (satellite), Iridium: Wikipedia, the Free Encyclopedia
  15. Iridium: Online Plain Text English Dictionary
  16. iridium: Webster's Revised Unabridged, 1913 Edition
  17. iridium: Rhymezone
  18. Iridium: AllWords.com Multi-Lingual Dictionary
  19. iridium: Webster's 1828 Dictionary
  20. iridium: FreeDictionary.org
  21. iridium: Mnemonic Dictionary
  22. iridium: TheFreeDictionary.com
  23. iridium: Longman Dictionary of Contemporary English

Business (2 matching dictionaries)
  1. Iridium: Investopedia
  2. Iridium (element), Iridium: Financial dictionary

Computing (1 matching dictionary)
  1. Iridium (element), iridium: Encyclopedia

Medicine (5 matching dictionaries)
  1. iridium: Merriam-Webster Medical Dictionary
  2. Dorland's Illustrated Medical Dictionary (No longer online)
  3. Medical Dictionary (No longer online)
  4. online medical dictionary (No longer online)
  5. Iridium (element), iridium: Medical dictionary

Science (2 matching dictionaries)
  1. Iridium: Extragalactic Astronomy
  2. Iridium, iridium: WebElements Periodic Table of the Elements

Tech (5 matching dictionaries)
  1. iridium: Webster's New World Telecom Dictionary
  2. GLOSSARY OF JEWELRY-RELATED TERMS (No longer online)
  3. IndyGem Glossary (No longer online)
  4. Illustrated Glass Dictionary (No longer online)
  5. iridium: Pen Glossary

(Note: See iridiums as well.)

Definitions from Wiktionary (iridium)

noun:  (uncountable) A chemical element (symbol Ir) with an atomic number of 77: a very hard, brittle, silvery-white transition metal of the platinum group.
noun:  (countable) A single atom of this element.

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Colors:
    charcoal,     slate gray,     pewter,     steel blue,     graphite, more...



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