rădĭātĭo

ōnis, f.

id.

I. a glittering, shining, a beamy lustre, radiation (postAug.): marmoris, Plin. 36, 5, 4, § 32: stellarum, Jul. Firm. Math. 1, 4. — Plur., Arn. 6, 208.
Lewis & Short
A Latin Dictionary, 1879
An open-access project