n. [ D. daalder, LG. dahler, G. thaler, an abbreviation of Joachimsthaler, i. e., a piece of money first coined, about the year 1518, in the valley (G. thal) of St. Joachim, in Bohemia. See Dale. ] 1. (a) A silver coin of the United States containing 371.25 grains of silver and 41.25 grains of alloy, that is, having a total weight of 412.5 grains. (b) A gold coin of the United States containing 23.22 grains of gold and 2.58 grains of alloy, that is, having a total weight of 25.8 grains, nine-tenths fine. It is no longer coined. [ 1913 Webster ]

☞ Previous to 1837 the silver dollar had a larger amount of alloy, but only the same amount of silver as now, the total weight being 416 grains. The gold dollar as a distinct coin was first made in 1849. The eagles, half eagles, and quarter eagles coined before 1834 contained 24.75 grains of gold and 2.25 grains of alloy for each dollar. [ 1913 Webster ]

2. A coin of the same general weight and value as the United States silver dollar, though differing slightly in different countries, formerly current in Mexico, Canada, parts of South America, also in Spain, and several other European countries. [ 1913 Webster +PJC ]

3. The value of a dollar; the unit of currency, differing in value in different countries, commonly employed in the United States and a number of other countries, including Australia, Canada, Hong Kong, parts of the Carribbean, Liberia, and several others. [ 1913 Webster +PJC ]

Chop dollar. See under 9th Chop. --
Dollar fish (Zool.), a fish of the United States coast (Stromateus triacanthus), having a flat, roundish form and a bright silvery luster; -- called also butterfish, and Lafayette. See Butterfish. --
Trade dollar, a silver coin formerly made at the United States mint, intended for export, and not legal tender at home. It contained 378 grains of silver and 42 grains of alloy.

A paper note printed by the Treasury, or by one of the Federal Reserve Banks under authority of the treasury, having the value of one dollar. Also five dollar bill, ten dollar bill, etc.: notes with the value of five, ten, etc. dollars. Prior to 1964 such notes could be redeemed for the equivalent dollar value in silver coins, but in that year the backing of the currency with silver was discontinued. Such notes not convertible into precious metals at a fixed rate are called "fiat money", receiving their value solely from the good faith of the issuing government and the confidence of those using the currency. [ PJC ]

n. (Zool.) A species of sunfish (Lepomis pallidus), common in the United States; -- called also blue sunfish, and copper-nosed bream. [ 1913 Webster ]

n. 1. small food fish (Poronotus triacanthus) of the Atlantic coast.
Syn. -- Poronotus triacanthus. [ WordNet 1.5 ]

2. any of several silvery marine fishes with very flat bodies.
Syn. -- moonfish, Atlantic moonfish, horsefish, horsehead, Selene setapinnis. [ WordNet 1.5 ]