The Collaborative International Dictionary of English v.0.48:
Rayless \Ray"less\ (r[=a]"l[e^]s), a. Destitute of rays; hence, dark; not illuminated; blind; as, a rayless sky; rayless eyes. [1913 Webster]WordNet (r) 3.0 (2006):
rayless adj 1: having no parts resembling rays; not having ray flowers