from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. protoplasm
from the GNU version of the Collaborative International Dictionary of English
- n. See protoplasm.
from The Century Dictionary and Cyclopedia
- n. The protoplasm or viscid fluid in which animal and vegetable cells are produced.
- n. The blastema or germinal or formative material of a cytode; protoplasmic cell-substance: specifically used of the common gelatinous matrix of protozoans, as sponges.
For example, the fluid part of the blood is the cytoblastema, the blood corpuscles being the cells.
This idea of the cytoblastema was early thrown into suspicion, and almost at the time of the announcement of the cell doctrine certain microscopists made the claim that these cells did not come from any structureless medium, but by division from other cells like themselves.
In such a history each cell comes from pre-existing cells and a cytoblastema plays no part.
Schwann had regarded cell growth as a kind of crystallization, beginning with the deposit of a nucleus about a granule in the intercellular substance -- the cytoblastema, as Schleiden called it.