Definition

1. Noun:
   • The living substance of a cell: "Protoplasm" is the fundamental, complex, semi-fluid substance that constitutes the living matter of a cell, including both the cytoplasm and the nucleus. It is the physical basis of life, responsible for all vital cellular processes.

Usage Examples

• Noun:
  • Under the microscope, the protoplasm within the amoeba appeared to be in constant motion.
  • Early biologists referred to protoplasm as the "physical basis of life."
  • The experiment studied the chemical properties of the cell's protoplasm.

Advanced Usage

• "Protoplasmic streaming": Also called cytoplasmic streaming, this refers to the movement of the protoplasm (cytoplasm) within a cell, often observed in plant cells and some single-celled organisms.
  • The rapid protoplasmic streaming in the algal cell facilitated the distribution of nutrients.

Variants and Related Words

• Protoplasmic (adj): Of or relating to protoplasm.

  • The scientist examined the protoplasmic structure of the tissue.

• Cytoplasm (n): The material within a living cell, excluding the nucleus. It is a major component of protoplasm.

• Nucleoplasm (n): The substance of a cell nucleus, also part of the protoplasm.

Synonyms

• Living matter: A general term for the substance of living cells.
• Cytosol (in a more specific, modern context): The liquid component of the cytoplasm, but this is not a perfect synonym as it excludes organelles and the nucleus.

Notes on Meaning

• Historical vs. Modern Usage: The term "protoplasm" was more commonly used in early cell biology to describe the essential living material. In modern, more precise biological terminology, scientists typically refer to its specific components—cytoplasm, nucleoplasm, and organelles—rather than using the collective term "protoplasm." However, it remains a valid and understood term for the collective living contents of a cell.

Noun

1. the substance of a living cell (including cytoplasm and nucleus)