protoplast

/ˈproʊtəˌplæst/
noun
  1. The living part of a plant or bacterial cell, consisting of the protoplasm and the cell membrane, especially after the cell wall has been removed.
    • The protoplast swelled when placed in a solution with lower salt concentration.
    • Scientists use protoplasts to create hybrid plants by fusing cells from different species.
    • In the lab, researchers isolated the protoplast from the plant cell to study its membrane.