actinic

It follows that the light emitted by the central axis of the tail greatly exceeds in actinic power the diffuse light around it.

It should be added that some people stand these actinic rays better than others.

The bleaching power of light depends on its actinic or chemical rays, which, like chlorine, appear to act as an oxidising agent.

When any of these mixtures are submitted to the action of actinic light, they become more or less insoluble.