noun
A small North American mammal of the squirrel family, having a heavy body and short legs, and living in burrows, especially the American woodchuck.
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The groundhog is a rodent of the family Sciuridae, belonging to the group of large ground squirrels known as marmots.
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I saw a groundhog digging in the backyard this morning.
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That groundhog is one sneaky critter, always stealing from the garden.
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The groundhog saw its shadow and predicted six more weeks of winter.