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Italian ferretto di Spagna, diminutive of ferro (iron), from Latin ferrum.


ferretto (uncountable)

  1. copper sulphide, used to colour glass
    (Can we find and add a quotation of Hebert to this entry?)

Part or all of this entry has been imported from the 1913 edition of Webster’s Dictionary, which is now free of copyright and hence in the public domain. The imported definitions may be significantly out of date, and any more recent senses may be completely missing.
(See the entry for ferretto in
Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913.)



ferretto m (plural ferretti)

  1. A piece of iron
  2. underwire (of a bra)
  3. red soil, rich in iron oxides