stroma: Meaning and Definition of

stro•ma

1. the supporting framework or matrix of a cell.
2. the supporting framework, usually of connective tissue, of an organ, as distinguished from the parenchyma.
3. (in certain fungi) a compact, somatic mass of fungous tissue, in or on which the fructifications may be developed.
4. the matrix of a chloroplast, containing various molecules and ions.