While the word pounds is an English word for a unit of weight measure, its common abbreviation of lbs goes against normal protocol because it does not share letters from the word for which it stands. This is because the English word gets its abbreviation from the word’s Latin origins. Lbs is the abbreviation for pounds because it is derived from the Latin word (and astrological sign) libra, which means scales or balance. The connection between pounds and libra is also thought to come from the phrase libra pondo, or “a pound by weight.” The Latin libra is also applied to the word pound outside of weight – it is the origin for the abbreviation of pound in the sense of British currency (£).
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