The protoplasm of a living plant or bacterial cell whose cell wall has been removed.
- ‘One stage at which the process may break down is the regeneration of plants from the fused protoplasts.’
- ‘In this plasmolysed cell the protoplast has suffered very intense shrinkage.’
- ‘The hydrostatic pressure model proposes that statocytes detect the total weight exerted by the protoplast on its cell wall.’
- ‘Fibres are often described as cells having no living protoplasts at maturity.’
- ‘A single cell culture, based on protoplasts that were isolated from the leaf mesophyll of tobacco, was used.’
Late 19th century: from Greek prōtoplastos first formed from prōtos first + plassein to mold.