Latin Influences in Our Language

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Why is lb the symbol for pound?

By Anne Marie Helmenstine Ph.D. ThoughtCo

Have you ever wondered why we use the symbol “lb” for the “pounds” unit? The word “pound” is short for “pound weight,” which was libra pondo in Latin. The librapart of the phrase meant both weight or balance scales. The Latin usage was shortened to libra, which naturally was abbreviated “lb”. We adopted the pound part from pondo, yet kept the abbreviation for libra.

There are different definitions for the mass of a pound, depending on the country. In the United States, the modern pound unit is defined to be 2.20462234 pounds per metric kilogram. There are 16 ounces in 1 pound. However, in Roman times, the libra(pound) was about 0.3289 kilograms and was divided into 12 uncia or ounces.

Sources
  • Fletcher, Leroy S.; Shoup, Terry E. (1978). Introduction to Engineering. Prentice-Hall. ISBN 978-0135018583.
  • United States National Bureau of Standards (1959-06-25). “Notices “Refinement of values for the yard and the pound“.
  • Zupko, Ronald Edward (1985). Dictionary of Weights and Measures for the British Isles: The Middle Ages to the 20th Century. DIANE Publishing. ISBN 0-87169-168-X.


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1 COMMENT

  1. Based on the zodiac. The only sunsign depicted by an object instead of an animal. Libra. Animals used to be classified by shape and function. But this brought them closer to humans, and religion sought separation and loathing of animals. The earth was to be subdued, not observed honestly.

    2 concerns. measure of time, and zoological classification or taxonomy. These two things are centralized and latinized.
    They say taxonomy on a scientific level started in the 1800’s , but I disagree completely. It is one of the oldest sciences and the way we classify species shapes our perceptions more than we like to think. The concept of time is also shaped and is a perverted version of an earlier more accurate system.