A troy weight containing twenty-four grains, or the twentieth part of a troy ounce; 1.555 grams; as, a pennyweight of gold or of arsenic.  It is abbreviated dwt or pwt.  It was anciently the weight of a silver penny, whence the name.
                                                            
                                                     
                        
                                                
                        
                        
                            a penny weight is a means of weighing precious metals. Comes from the British weight system. There are 20 pennyweights in a troy ounce. Click here for more weight comparisions.
                                                            
                                                     
                        
                                                
                        
                        
                            A measurement of weight, 1 pennyweight = 24 grains, 20 pennyweight = 1 troy ounce
                                                            
                                                     
                        
                                                
                                                     
                        
                        
                            The twentieth part of a troy ounce. The name originally applied to the weight of an AngloNorman penny.
                                                            
                                                     
                        
                                                
                        
                        
                            Originally the weight of an English silver penny or 1/24th of a Tower pound. Still used in the U.S. as a unit of measure for gold. Most other countries, however, have adopted the metric system, using grams. In Troy weight, 20 pennyweights (dwt.) = 1 ounce.
                                                            
                                                     
                        
                                                
                        
                        
                            A unit of weight equal to 1/20th of an ounce. DWT is the abbreviation for Pennyweight.
                                                            
                                                     
                        
                                                
                        
                        
                            A measure used to weigh precious metals of gold, platinum and silver, a pennyweight (abbreviated dwt.) is equal to 24 grains and there are 20 pennyweights in a Troy ounce.
                                                            
                                                     
                        
                                                
                        
                        
                            an American unit of weight for gold in which one pennyweight equals 24 grains or 1/20 of a troy ounce.
                                                            
                                                     
                        
                                                
                        
                        
                            A system of measuring the size of a nail. - Originally derived from a unit of weight, pennyweight is represented by the letter "d."
                                                            
                                                     
                        
                                                
                        
                        
                            A unit of Troy weight, used for weighing precious metals. The pennyweight contains one-twentieth of an ounce. Abbreviated "dwt."
                                                            
                                                     
                        
                                                
                        
                        
                            a unit of apothecary weight equal to 24 grains 
                                                            
                                                     
                        
                                                
                        
                        
                            A unit in troy weight equal to 24 grams or 1/20 of an ounce.
                                                            
                                                     
                        
                                                
                        
                        
                            A unit of weight equal to one twentieth of a troy ounce.
                                                            
                                                     
                        
                                                
                        
                        
                        
                                                
                        
                        
                            A Troy weight of 24 grains. (See Troy Weights)
                                                            
                                                     
                        
                                                
                        
                        
                            1/20 part of a troy ounce. 24 grains equal 1 dwt.
                                                            
                                                     
                        
                                                
                        
                        
                            A unit of Troy weight. It is equal to 24 grains, 1/20th of a troy ounce or 1/240th of a troy pound. It was the the original weight of the old English silver penny, of which 240 made a Pound Sterling. Abbreviation (dwt). see; Troy Weight
                                                            
                                                     
                        
                                                
                        
                        
                            A unit of the troy system of weight measurement. One pennyweight equals 24 grains, and is 1/20th of a troy ounce. See my " Weight Conversion Table " page for more information
                                                            
                                                     
                        
                                                
                        
                        
                            An American unit of weight for gold. Twenty pennyweights equal one ounce.
                                                            
                                                     
                        
                                                
                        
                        
                            A pennyweight (dwt) is an obsolete unit of mass which is the same as 24 grains, 1/240th of a troy pound, 1/20th of a troy ounce, or approximately 1.555 grams. A penny was literally, as well as monetarily, 1/240th of a troy pound of sterling silver.