E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
The material or cells of which all living things are built up. Each is a jelly-like substance, the former being the nucleus of plants and the latter of animals. Max Schultz proved the identity of these substances.
Protoplasm is not a simple but a complicated structure, sometimes called a colony of plasts, or nuclear granules. (Greek, proto-plasma, the first model; proto-sarkodes, the first flesh-like entity.)