Definitions

from The Century Dictionary.

  • noun In chem., an atom whose quantivalence is expressed by an even number, as the atoms of sulphur, oxygen, etc. See perissad.
  • noun In zoology, an even-toed ungulate quadruped; a cloven-footed ruminant animal; one of the Artiodactyla: opposed to perissad. See cut under Artiodactyla.
  • In chem., having the nature of an artiad: as, oxygen is an artiad element.
  • noun The Cynara Scolymus, a plant of the natural order Compositæ, somewhat resembling a thistle, with large divided prickly leaves.

from the GNU version of the Collaborative International Dictionary of English.

  • adjective (Chem.) Even; not odd; -- said of elementary substances and of radicals the valence of which is divisible by two without a remainder.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • adjective chemistry even; not odd; said of elementary substances and radicals whose valence is divisible by two without a remainder.

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

Ancient Greek even.

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Examples

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