noun
a small tooth or toothlike projection, especially on the surface of a shell or the exoskeleton of an arthropod
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The denticle on the shark's skin helps reduce drag as it swims through the water.
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I noticed a small denticle on the edge of the table.
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That denticle on your car bumper is really noticeable.
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Her sharp words were like denticles, leaving small wounds on his ego.