Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • The symbol for the element iron.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Symbol for iron.
  • n. American Library Association abbreviation for forty-eighth, a book size (7.5-10 cm in height); a book of that height.

from The Century Dictionary and Cyclopedia

  • An abbreviation of Fellow of the Entomological Society;
  • of Fellow of the Ethnological Society.
  • n. The chemical symbol of iron (Latin fer-rum).

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a heavy ductile magnetic metallic element; is silver-white in pure form but readily rusts; used in construction and tools and armament; plays a role in the transport of oxygen by the blood

Etymologies

From Latin ferrum, iron.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From Latin ferrum ("iron") (Wiktionary)
Abbreviation, from forty-eighth, corresponding to one forty-eighth of a standard uncut sheet of paper. (Wiktionary)

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