The protoplasm of a living plant or bacterial cell whose cell wall has been removed.In this plasmolysed cell the protoplast has suffered very intense shrinkage....
Fibres are often described as cells having no living protoplasts at maturity.
The hydrostatic pressure model proposes that statocytes detect the total weight exerted by the protoplast on its cell wall.
Origin
Late 19th century: from Greek prōtoplastos 'first formed', from prōtos 'first' + plassein 'to mould'.