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Noun: bone-ash cup
  1. A small porous bowl made of bone ash used in assaying to separate precious metals from e.g. lead
    - cupel, refractory pot

Derived forms: bone-ash cups

Type of: vessel

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bone char
bone china
bone dry
bone fat
bone marrow
bone of contention
bone oil
bone spavin
bone up
bone-ash cup
bone-covered
boned
bone-dry
bonefish
bone-forming cell
bonehead
boneheaded
bone-headed dinosaur
bone-idle
bone-lazy