Sentence Examples with the word infolding

More usually, by an infolding of the layer of cells in development, we get three layers under the lens; the front layer is the corneagen layer, and is separated by a membrane from the other two which, more or less, fuse and contain the nerve-end-cells (retinal layer).

Mostly large forms, of Carboniferous and Permian age, with a more or less complex infolding of the walls of the teeth.