lb

See also: LB and Appendix:Variations of "lb"

Translingual

Etymology 1

(computer science): From New Latin logarithmus binarii (“binary logarithm”).

Symbol

lb

1. (computer science) Binary logarithm; logarithm to the base 2.

   $\mathrm{l}\mathrm{b}(x)={\log }_2(x)$. $\mathrm{l}\mathrm{b}(2)=1$

Usage notes

(computer science): The ISO 80000-2:2019 standard prescribes this symbol for the binary logarithm.

Synonyms

• ld
• lg

Related terms

• ln
• log

Etymology 2

Clipping of Luxembourgish Lëtzebuergesch or English Luxembourgish.

Symbol

lb

1. (international standards) ISO 639-1 language code for Luxembourgish.

See also

• Wiktionary’s coverage of Luxembourgish terms

English

Pronunciation

• IPA^(key): /paʊnd/

• Audio (US):

  (file)

• Rhymes: -aʊnd
• Homophone: pound

Etymology 1

(unit of weight): Abbreviation of libra.

Alternative forms

• (pound): LB., Lb., lb., Lb, LB

Noun

lb (plural lbs or lbs.)

1. Abbreviation of pound (“unit of weight”).
   • 2000 October 9, Gérard P. Michon, “What is a slug, in the [engineering] weight measurement system?”, in Numericana.com‎^[1], archived from the original on 22 September 2026:

     The slug is defined as the mass which would accelerate at a rate of 1 ft/s² under a force of one pound-force (lbf). Since 1 lbf is the force exerted on a mass of one pound by a standard gravitational field (of exactly 9.80665 meters per square second), a slug is thus exactly equal to 196133/6096 pounds (about 32.1740485564 lb or 14.593902937206 kg).

   • 2012 March 9, “Green cars at 2012 Geneva motor show – in pictures”, in Alan Rusbridger, editor, The Guardian‎^[2], London: Guardian News & Media, →ISSN, →OCLC, archived from the original on 17 October 2026:

     The drive system can provide a maximum of 516 lbs ft (700 Nm) at any one time.

Derived terms

• ft-lb
• The struck-through abbreviation ℔ simplified to the pound sign (octothorpe) #.
• lb_f
• lb_m

Etymology 2

Abbreviation

Noun

lb (plural lbs)

1. (cricket) leg bye

Anagrams

• B&L, B/L, BL