sil atticum

1 definition found

sil atticum - Collaborative International Dictionary of English v.0.48 :

  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.
     [1913 Webster] Almayne
     Almain