Unit of measurement which is equivalent to 0.0001 of gram.
                                                            
                                                     
                        
                                                
                        
                        
                            A measurement of weight equivalent to 1/1,000 of a milligram.
                                                            
                                                     
                        
                                                
                        
                        
                            one millionth (1/1,000,000) gram 
                                                            
                                                     
                        
                                                
                        
                        
                        
                                                
                        
                        
                            a one millionth part of one gramme
                                                            
                                                     
                        
                                                
                        
                        
                            One-millionth of one gram.
                                                            
                                                     
                        
                                                
                        
                        
                            A metric measure of weight used in dosages. There are 1,000 mcg in 1 milligram (mg). MILLIGRAM (mg) A metric measure of weight used in dosages. There are 1,000 mg in 1 gram.
                                                            
                                                     
                        
                                                
                        
                        
                            A measurement of weight equivalent to 1/1000 milligram.
                                                            
                                                     
                        
                                                
                        
                        
                            (mcg): 1/1,000 of a milligram in weight.
                                                            
                                                     
                        
                                                
                        
                        
                            A measurement of weight equal to one one-thousandth of a milligram.
                                                            
                                                     
                        
                                                
                        
                        
                        
                                                
                        
                        
                            A measurement of mass; commonly used in measuring dietary supplements (1 mcg= 10^-6 grams).