The siliqua is the modern name given (without any ancient evidence) to small, thin, Roman silver coins produced in the 4th century A.D. and later. 
When the coins were in circulation, the Latin word siliqua was a unit of weight defined as one twenty-fourth of the weight of a Roman solidus.
When the coins were in circulation, the Latin word siliqua was a unit of weight defined as one twenty-fourth of the weight of a Roman solidus.

                    (1)
                                 Anonymous
                            
                
                
                 
                
                
                    
                        An
                        AR
                                        Siliqua
                                    
                        struck                             530-580
 in
                                        Constantinopolis?
                                    
                    
                
                
                
                                Obverse: Helmeted, draped, cuirassed bust right,
                            
                            
                                Reverse: K
                            
                            
                            Diameter: 
                                14 mm
                            
Die Orientation: -
Weight: 1.2 g
                            
                        
                        
                        Die Orientation: -
Weight: 1.2 g
Anonymous Issue. Ex Cng coin                        
                        
                        
                                Vagi 3051; Bendall Type 8c
                        
                    