Hypertext Webster Gateway: "Almagra"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Almagra \Al*ma"gra\, n. [Sp. almagra, almagre, fr. Ar.
al-maghrah red clay or earth.]
A fine, deep red ocher, somewhat purplish, found in Spain. It
is the {sil atticum} of the ancients. Under the name of
{Indian red} it is used for polishing glass and silver.
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