loggerhead
US /ˈlɑː.ɡɚ.hed/
UK /ˈlɑː.ɡɚ.hed/
1.
a large-headed sea turtle with powerful jaws, found in warm and temperate seas
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The divers spotted a magnificent loggerhead turtle near the coral reef.
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Loggerheads are known for their powerful jaws, which they use to crush shellfish.
1.
in a dispute or disagreement
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The two companies are at loggerheads over the new contract.
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They've been at loggerheads for weeks, unable to agree on anything.