LB. definitions

lb.

lb.: The abbreviation for pound, the measure of weight, lb. (plural: lb. or lbs.) stands for "libra" (Latin for pound).
Found on http://www.medterms.com/script/main/art.asp?articlekey=6231

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LB.

Libens, Liberi, Libertus.
Found on http://www.translationdirectory.com/glossaries/glossary113.htm

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lb.

libra; lb. Pound.
Found on http://www.wordinfo.info/words/index/info/view_unit/3473/2

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