American Heritage® Dictionary of the English Language, Fourth Edition
- n. The white, powdery calcium phosphate ash of burned bones, used as a fertilizer, in making ceramics, and in cleaning and polishing compounds.
Century Dictionary and Cyclopedia
- n. Same as bone-earth.
- n. The white, powdery ash left when bone is burnt; it is high in calcium phosphate and is used as a fertilizer and in making bone china.
GNU Webster's 1913
- n. burnt powered; bone earth.
- n. the residue from calcined bones; -- used for making cupels, and for cleaning jewelry.
- n. ash left when bones burn; high in calcium phosphate; used as fertilizer and in bone china
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