from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. An orthorhombic mineral first discovered on the Moon.


From the names of astronauts Armstrong, Aldrin, and Collins +‎ -ite; it was discovered by the Apollo 11 crew. (Wiktionary)


  • Among the substances the rock could contain is armalcolite, a mineral first discovered on the moon and named for Neil Armstrong, Buzz Aldrin and Michael Collins, who was on the Apollo 11 lunar mission crew.

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  • Named for Armstrong, Aldrin and Collins, the Apollo 11 astronauts. Armstrong and Aldrin discovered the mineral at Tranquility Base on the moon. :-)

    March 7, 2010

  • A glorious and historically lovely mineral. Is "multieponymous" a word?

    March 3, 2010