dollarfishes See {dollarfish} dollarfish n 1: small food fish of Atlantic coast [syn: {Poronotus triacanthus}] 2: any of several silvery marine fishes with very flat bodies [syn: {moonfish}, {Atlantic moonfish}, {horsefish}, {horsehead}, {horse-head}, {Selene setapinnis}] [also: {dollarfishes} (pl)]