Pound (mass)

Comparison of the relative sizes of avoirdupois, Troy, tower, merchant and London pounds.

Various historic pounds from a German textbook dated 1848

The pound or pound-mass (abbreviations: lb, lb_m, lbm, ℔) is a unit of mass used in the imperial, United States customary and other systems of measurement. A number of different definitions have been used, the most common today being the international avoirdupois pound which is legally defined as exactly 6999453592370000000♠0.45359237 kilograms, and which is divided into 16 avoirdupois ounces.

单词	Avoirdupois pounds
释义	Avoirdupois pounds 英语百科 Pound (mass) The pound or pound-mass (abbreviations: lb, lb_m, lbm, ℔) is a unit of mass used in the imperial, United States customary and other systems of measurement. A number of different definitions have been used, the most common today being the international avoirdupois pound which is legally defined as exactly 6999453592370000000♠0.45359237 kilograms, and which is divided into 16 avoirdupois ounces.
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Avoirdupois pounds

Pound (mass)