spodium

noun
spo·​di·​um | \ ˈspōdēəm\
plural -s

Definition of spodium

1 obsolete : a powder obtained as a product or residue of combustion (such as soot from melting metals or vegetable ash)
2 : bone or animal charcoal especially : spent bone black from sugar factories used as fertilizer

History and Etymology for spodium

Middle English, from Latin, from Greek spodion, diminutive of spodos wood ash

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