Of or relating to the acetabulum; having a cup-shaped or socket-like form.
From Latin acetabulum (small vinegar cup, hip socket) plus -ous (full of, characterized by). Anatomical term from medieval Latin scientific texts.
Medieval anatomists literally called your hip socket a 'vinegar cup'—they weren't being poetic, but practical, since the Roman acetabulum was a small vinegar dish of exactly that shape!
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