noun
a small, edible, marine bivalve mollusk with a strong ribbed shell
verb
to wrinkle or pucker, typically the skin
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The scientist studied the effects of pollution on the cockle population in the estuary.
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I found a beautiful cockle shell on the beach today.
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I can't believe he had the cockles to ask her out on a date.
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Her heart swelled with warmth, like the cockles of a cozy fireplace.