Cell Component
protoplasm Audio
pro·to·plasm [ proh-tuh-plaz-uhm ]
Etymology:
Greek protos = first + plasma = a thing formed
Hence protoplasm is the primary material. Purkinje, in 1837, applied the term protoplasm to the embryonic ground substance of the germinal vesicle in the embryo.
Definitions related to protoplasm:
  • Cell component which has as its direct parts a maximally connected part of cytoplasm and one or more cell nuclei. Examples: protoplasm of hepatocyte, protoplasm of megakaryocyte.
    Foundational Model of Anatomy
    University of Washington, 2017
  • Cell substance which consists of the cytoplasm and cell nucleus; surrounded by the plasma membrane. Examples: muscle cell protoplasm, protoplasm of neuron.
    Digital Anatomist
    University of Washington, 2003
  • The organized colloidal complex of organic and inorganic substances (as proteins and water) that constitutes the living nucleus, cytoplasm, plastids, and mitochondria of the cell. It is composed mainly of nucleic acids, proteins, lipids, carbohydrates, and inorganic salts.
    NCI
    U.S. National Cancer Institute, 2021
  • (intracellular anatomical structure) A component of a cell contained within (but not including) the plasma membrane. In eukaryotes it includes the nucleus and cytoplasm.
    Gene Ontology Dictionary
    Gene Ontology Consortium, 2021
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This content should not be used in place of medically-reviewed decision support reference material or professional medical advice. Some terms may have alternate or updated definitions not reflected in this set. The definitions on this page should not be considered complete or up to date.