poundage
/ˈpaundɪdʒ; `paʊndɪdʒ/ n[U]
1 charge of a certain sum (eg 5p) per pound in value (1) 按每英镑价值所付的费用（如 5 便士）; 每英镑收费.
2
(a) charge of a certain sum (eg 5p) per pound in weight (1 lb) 按每磅重量所付的费用（如5便士）; 每磅收费.
(b) charge of a certain amount (eg 3 oz) per pound in weight (1 lb) 按每磅重量之定量（如 3 盎司）所付的费用.