Stroma (animal tissue), the connective, functionally supportive framework of a biological cell, tissue, or organ
Stroma, the thick fluid found in between grana, which are stacks of thylakoid disks. Stroma is where the carbohydrate formation reactions occur in the chloroplast of plant cells undergoing photosynthesis.
Stromal cell, a connective tissue cell of an organ found in the loose connective tissue