Definition

Relating to or caused by light, especially light that can produce chemical changes, such as ultraviolet light.

Example

The actinic rays from the sun can cause chemical reactions in certain materials.

Conversation

Did you know that some lights can be actinic and cause chemical reactions?

Really? I didn't know that about lights.

Yeah, it’s interesting how actinic light affects photography too.

That makes sense; I guess that's why some photos look so different.

Synonyms & Antonyms

Root Explanation

Actinic → It is formed from "actinus" (from Greek "aktinos", meaning ray or beam) and the suffix "-ic" (meaning pertaining to). The word "actinic" refers to something that is related to or produces rays, especially in the context of light or radiation.

Memory Tip

Think of 'rays' ('aktinos') when you hear 'actinic' — it helps you remember that actinic relates to rays or light.

Visually Confused Words