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hypoglossus

hypoglossus Anat.
  (hɪpəʊˈglɒsəs)
  [mod.L., f. Gr. ὑπό under + γλῶσσα tongue: cf. Gr. ὑπογλώσσιος, F. hypoglosse.]
  The hypoglossal nerve.

1811 Hooper Med. Dict., Hypoglossus,..a nerve which goes to the under part of the tongue. 1878 Bell Gegenbaur's Comp. Anat. 522 The hypoglossus, which supplies the muscles of the tongue.

Oxford English Dictionary

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