Able to be seen through, being either transparent or translucent.
                                                            
                                                     
                        
                                                
                        
                        
                            so thin as to transmit light; "a hat with a diaphanous veil"; "filmy wings of a moth"; "gauzy clouds of dandelion down"; "gossamer cobwebs"; "sheer silk stockings"; "transparent chiffon"; "vaporous silks" 
                                                            
                                                     
                        
                                                
                        
                        
                            It is a term used for the ability to be seen through, either transparent or translucent.