D defs.my
Entry 1 sense Webster, 1913

groundhog

/(ground"hŏg`)/ · ground·hog · IPA /ˈɡɹaʊn(d)ˌ(h)ɔɡ/
01 n. A reddish brown North American burrowing marmot (Marmota monax), also called the woodchuck. It hibernates in the winter.
  1. 1.
    A reddish brown North American burrowing marmot (Marmota monax), also called the woodchuck. It hibernates in the winter. Also: woodchuck