Definition of tuatara
: a large spiny quadrupedal reptile (Sphenodon punctatum) of islands off the coast of New Zealand that has a vestigial third eye in the middle of the forehead representing the pineal gland and that is the only surviving rhynchocephalian
Recent Examples of tuatara from the Web
On New Zealand's North Brother Island, for instance, rising temperatures have already biased the local tuatara population male—
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Origin and Etymology of tuatara
First Known Use: 1890See Words from the same year
Seen and Heard
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