a semifluid, viscous, translucent colloid, the essential living matter of all animal and plant cells: it consists largely of water, proteins, lipids, carbohydrates, and inorganic salts and is differentiated into nucleoplasm and cytoplasm
Origin of protoplasmGerman protoplasma: see proto- and amp; plasma
The complex, semifluid, translucent substance that constitutes the interior matter of a living cell and is composed of proteins, fats, and other molecules suspended in water. It includes the cytoplasm, the nucleus in eukaryotes, and organelles such as mitochondria.
- pro′to·plas′mic , pro′to·plas′mal , pro′to·plas·mat′ic