are letters that make 'Rg'
are words within 'Rg'
are words created by adding a letter to 'Rg'
1 possible definitions for 'Rg'
Under this definition, rg is a noun and has the following properties:
roentgenium, element 111, atomic number 111
have the same meaning as 'Rg'
'Rg' can be a type of chemical element, element.