Collins COBUILD Advanced Learner's English Dictionary - -pounder

(-pounders) 1. -pounder can be added to numbers to form nouns that refer to animals or fish that weigh a particular number of pounds. My fish average 2 lb 8 oz and I’ve had two eight-pounders. COMB in N-COUNT 2. -pounder can be added to numbers to form nouns that refer to guns that fire shells weighing a particular number of pounds. The guns were twelve-pounders. COMB in N-COUNT