R1A1D2I1A1N1T1S1
9 points
RADIANTS is validvalid
RADIANT, a point from which rays are emitted [n]
RADIANT, a straight line from a point about which it is conceived to revolve [n]
RADIANT, a point from which rays are emitted [n]
RADIANT, a straight line from a point about which it is conceived to revolve [n]