noun
a type of unsegmented worm with a long, cylindrical body
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The nematode is a type of roundworm that can be found in soil, water, plants, and animals.
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I heard that nematodes can be a problem for gardeners trying to grow vegetables.
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Those nematodes are a real pain in the butt for farmers.
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The nematode of doubt wriggled in the back of his mind, causing him to second-guess his decisions.