Pronunciation: (prō'tu-plast"), [key]
a. the contents of a cell within the cell membrane, considered as a fundamental entity.
b. the primordial living unit or cell.
2. a person or thing that is formed first; original; prototype.
3. the hypothetical first individual or one of the supposed first pair of a species or the like.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.