Pound (mass) | Wikipedia audio article
Channel: wikipedia tts
Date: 2019-06-23

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Pound_(mass)


00:01:31 1 Current use
00:04:08 2 Historic use
00:04:34 2.1 Roman ilibra/i
00:05:09 2.2 In Britain
00:06:02 2.2.1 Avoirdupois pound
00:07:03 2.2.2 Imperial Standard Pound
00:09:54 2.2.3 Relationship to the kilogram
00:10:33 2.2.4 Troy pound
00:11:41 2.2.5 Tower pound
00:12:56 2.2.6 Merchants' pound
00:15:06 2.2.7 London pound
00:15:45 2.3 In the United States
00:16:30 2.4 Byzantine litra
00:17:51 2.5 French livre
00:19:40 2.6 German and Austrian Pfund
00:21:13 2.7 Russian funt
00:23:11 2.8 Skålpund
00:23:42 2.9 Portuguese libra and arrátel
00:24:33 2.10 Jersey pound
00:25:50 2.11 Trone pound
00:26:23 2.12 Metric pounds
00:26:48 3 Use in weaponry
00:28:34 4 See also
00:29:24 5 Notes
00:29:36 6 External links
00:29:45 6.1 Conversion between units
00:29:55 Conversion between units



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SUMMARY
=======
The pound or pound-mass is a unit of mass 
used in the imperial, United States customary and other systems of measurement. Various definitions have been used; the most common today is the international avoirdupois pound, which is legally defined as exactly 0.45359237 kilograms, and which is divided into 16 avoirdupois ounces. The international standard symbol for the avoirdupois pound is lb; an alternative symbol is lbm (for most pound definitions), # (chiefly in the U.S.), and ℔ or ″̶ (specifically for the apothecaries' pound).
The unit is descended from the Roman libra (hence the abbreviation "lb").  The English word pound is cognate with, among others,  German Pfund, Dutch pond, and Swedish pund.  All ultimately derive from a borrowing into Proto-Germanic of the  Latin expression lībra pondō ("a pound by weight"), in which the word pondō is the ablative case of the Latin noun pondus ("weight").Usage of the unqualified term pound reflects the historical conflation of mass and weight. This accounts for the modern distinguishing terms pound-mass and pound-force.