Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Having four atoms per molecule.
  • adj. Having four replaceable univalent atoms or radicals.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. consisting of four atoms

from the GNU version of the Collaborative International Dictionary of English

  • adj. Consisting of four atoms; having four atoms in the molecule, as phosphorus and arsenic.
  • adj. Having a valence of four; quadrivalent; tetravalent; sometimes, in a specific sense, having four hydroxyl groups, whether acid or basic.

from The Century Dictionary and Cyclopedia

  • Same as tetradic.

Etymologies

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