Definition of photoreversal in US English:

photoreversal

noun

Biology
  • Reversal of a (biological) process by the action of light.

Origin

1950s; earliest use found in Proceedings of the Royal Society of London. From photo- + reversal, after photoreversible.

Pronunciation

photoreversal

/ˌfəʊtəʊrɪˈvəːsl/