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