from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. hydrogen, especially when formerly considered as a metal

from the GNU version of the Collaborative International Dictionary of English

  • n. Hydrogen; -- called also in view of its supposed metallic nature.

from The Century Dictionary and Cyclopedia

  • n. Hydrogen regarded as a metal; solidified hydrogen.
  • n. Hydrogen occluded by palladium. See occlusion.


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