Letters that make CMBR
b, c, m, r are letters that make 'CMBR'
1 possible definitions for 'CMBR'
Under this definition, cmbr is a noun and has the following properties:
CBR, cosmic microwave background radiation, cosmic microwave background, CMB, cosmic background radiation have the same meaning as 'CMBR'
'CMBR' can be a type of cosmic radiation.