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

  • n. A unit of weight in ancient Rome equivalent to about 12 ounces.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A Roman unit of weight equal to about 327 grams.
  • n. Any of various units of weight in Spanish- and Portuguese-speaking countries approximately equal to 460 grams or a little more than a US or UK pound.
  • n. Alternative spelling of libbra, an Italian unit of weight.


Middle English, from Latin lībra.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From Latin libra. (Wiktionary)



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