顎 - jaw, chin, gill

jaw; chin

prognathism

gnathostomiasis; larva migrans profundus

chaetognath (any worm of phylum Chaetognatha)

maxilliped; gnathopod

Viola verecunda (violet species)

upper jaw; palate

submandibular gland; submaxillary gland

suddenly lifting someone's face by their chin (in a domineering yet romantic fashion)

jaw

beard (esp. on the chin); goatee

mandible; lower jawbone