Confused and have questions? We’ve got answers.
With Chegg Study
, you can get step-by-step solutions to your questions from an expert in the field. If you rather get 1:1 study help, try 30 minutes of free online tutoring with Chegg Tutors
From Biology-Online Dictionary
Of, pertaining to, or denoting, those rays of light which produce chemical effects; actinic.
Origin: L. Tithonius belonging to Tithonus, the consort of Aurora, Gr.