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Pronunciation varies by accent · 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..
On the moon, however the weight of a pound-mass (lb or lbm) is only about one sixth of a pound-force (lbf).
Use pound-mass when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
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..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
On the moon, however the weight of a pound-mass (lb or lbm) is only about one sixth of a pound-force (lbf).
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