The phrase "numerous scientific journals" means there are many magazines or publications that focus on scientific research and findings. Full definition
She has written for several online publications and has been published in numerous scientific journals in the areas of mental health and addiction. (oureverydaylife.com)
He also serves as a reviewer for numerous scientific journals. (gladstone.org)
Dr. Yue serves on the editorial boards and peer review panels of numerous scientific journals. (KesslerFoundation.org)