Noun sphenodon has 1 sense
  1. Sphenodon, genus Sphenodon - coextensive with the order Rhynchocephalia: tuataras
    --1 is a kind of reptile genus
    --1 is a member of Rhynchocephalia, order Rhynchocephalia
    --1 has members: tuatara, Sphenodon punctatum
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