from The Century Dictionary.

  • noun A key; specifically, a key to or an aid to the understanding of something difficult, as a cipher, or the study of a foreign or classic author in his own language.

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

  • noun A key; a glossary.

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

  • noun archaeology A Roman key.
  • noun A device for restraint of the hands.
  • noun A glossary.
  • noun biology A key; an identification guide; a series of logically organized groups of discriminating information which aims to allow the user to correctly identify a taxon.


from Wiktionary, Creative Commons Attribution/Share-Alike License

From Latin clāvis.


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