(a.) Destitute of rays; hence, dark; not illuminated; blind; as, a rayless sky; rayless eyes.

ableptical amaurotic beamless benighted bereft of light black black as night blind caliginous color-blind dark dark as night dark as pitch darkling darksome dim-sighted ebon ebony eclipsed eyeless hemeralopic in darkness mind-blind night-black night-clad night-cloaked night-dark night-enshrouded night-filled night-mantled night-veiled nyctalopic obfuscated obscure obscured occulted pitch-black pitch-dark pitchy sightless spiritually blind stark blind starless stone-blind sunless tenebrious tenebrose tenebrous undiscerning unenlightened unilluminated unlighted unlit unobserving unperceiving unseeing visionless