Word.ws English Dictionary

pound-mass

pound-mass noun: a unit of mass equal to the weight, on earth (subject to standard gravity), of a mass of one avoirdupois pound, equal to about 453.592 grams. Symbol lbm or lbₘ.

Noun

pound-mass (plural pounds-mass)

  1. A unit of mass equal to the weight, on earth (subject to standard gravity), of a mass of one avoirdupois pound, equal to about 453.592 grams. Symbol lbm or lbₘ.
    • On the moon, however the weight of a pound-mass (lb or lbm) is only about one sixth of a pound-force (lbf).2000 October 9, Gérard P. Michon, “What is a slug, in the [engineering] weight measurement system?”, in Numericana.com

Forms of pound-mass

pluralpounds-mass

Origin of pound-mass

From pound + mass, to differentiate from the unit of weight.

Questions about pound-mass

What does pound-mass mean?
Pound-mass means a unit of mass equal to the weight, on earth (subject to standard gravity), of a mass of one avoirdupois pound, equal to about 453.592 grams. Symbol lbm or lbₘ.
What part of speech is pound-mass?
Pound-mass is a noun.
What is the plural of pound-mass?
The plural of pound-mass is pounds-mass.

Words near pound-mass in the dictionary

  1. pound town
  2. pound-foolish
  3. pound-for-pound
  4. pound-force
  5. pound-forces
  6. pound-mass
  7. pound-shop
  8. poundable
  9. poundage
  10. poundaged
  11. poundages

Source and license

Adapted from Wiktionary: pound-mass (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

Last updated:

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