passive iron

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English

Noun

passive iron (uncountable)

  1. (chemistry) Iron that has been subjected to the action of heat, strong nitric acid, chlorine, etc. It is then not easily acted upon by acids.

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 The imported definitions may be significantly out of date, and any more recent senses may be completely missing.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 passive iron”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.)