Definitions

1. adjective

Lacking or deficient in actinic rays or their effect, as in a darkened room.

“The inactinic conditions inside the cave prevented any plant life from thriving.”

2. adjective

Relating to or resulting from the absence or deficiency of actinic rays.

“The inactinic environment of the aquarium required specialized lighting to simulate natural conditions.”

3. noun

A condition or state characterized by the absence or deficiency of actinic rays.

“The inactinic of the room made it difficult to read books during the day.”