R1A1D2I1A1T1I1O1N1L1E1S1S1
14 points
RADIATIONLESS is validvalid
not involving radiation [adj]
without radiation, heat transport without the intervention of matter, as in the transport of heat from the Sun to the Earth [adj]
not involving radiation [adj]
without radiation, heat transport without the intervention of matter, as in the transport of heat from the Sun to the Earth [adj]