Cells without cell wall are termed as

Cells without cell walls are termed Protoplast.
It is a biological term coined by Hanstein in 1880 to refer to the entire cell, excluding the cell wall. It can be removed from the plant, bacterial or fungal cells using mechanical, chemical, or enzymatic means.
Protoplast can be used to study membrane biology and soma clonal variation, including the uptake of macromolecules and viruses.