A "cell layer" refers to a group or sheet of cells stacked on top of each other, forming a specific tissue or lining in a living organism. Full definition
The lining of our gut is only one - cell layer thick and very delicate. (bonappetit.com)
The laser power may also be set for rapid removal of large tissue amounts or adjusted to remove only one cell layer at a time. (derryanimalhospital.com)
The lining of our colon is only one cell layer thick and therefore very susceptible to environmental toxins. (parsleyhealth.com)