1. Due to the sun's rays.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• acinicd,
• aciinic,
• acinik,
• actinil,
• actinari,
• actinc,
• actinya,
• actinina,
• acctinian,
• actinial,
• sctinic,
• sactinic,
• atinic,
• ectinic,
• actinik,
• actinim,
• actinsim,
• actinol,
• actiti,
• acittis

• actinia,
• actinaria,
• actinide,
• actinidia,
• acetonic,
• actinal,
• actinozoa,
• acuteness,
• actinozoan,
• Acton,
• actinian,
• actiniaria,
• acting,
• acetone,
• actium,
• actin,
• action,
• actinon,
• actinism,
• actinium,
• actinoid,
• actinopod,
• actinolite.

The adjective form of the word "actinic" is "actinically".

The plural form of the word "actinic" is "actinics".

The singular form of the word "actinic" is "actin"