English edit

Etymology edit

un- +‎ rayed

Adjective edit

unrayed (not comparable)

  1. Not exposed to radiation.
    • 1943, Cushman Davis Haagensen, Wyndham Edward Buckley Lloyd, A Hundred Years of Medicine, page 164:
      [] but what attracted Steenbock's attention was the fact that when the rayed rats were put, after their treatment, into the same cage as their unrayed brother controls, these unrayed rats also began to grow.