Definition of protoplast in English:

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Pronunciation: /ˈprōdəˌplast/


chiefly Botany
The protoplasm of a living plant or bacterial cell whose cell wall has been removed.
Example sentences
  • 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.



Pronunciation: /ˌprōdəˈplastik/
Example sentences
  • In principle, the cell-to-cell (‘protoplastic’) component would have to be split into a symplastic and a transcellular component.
  • It has been well recognized that protoplastic sources centred upon mitochondrial, chloroplastic or peroxisomal generating systems exist, but have mainly been studied in relation to abiotic stresses.
  • To the various forms of mutation breeding, add in such techniques as protoplastic cell fusion, embryo rescue, meristem tip culture and other forms of tissue culture or somoclonal variation.


Late 19th century: from Greek prōtoplastos 'first formed', from prōtos 'first' + plassein 'to mold'.

For editors and proofreaders

Syllabification: pro·to·plast

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