Stroma may refer to:Stroma, Scotland, an island off the northern coast of ScotlandStroma (animal tissue), the connective, functionally supportive framework of a biological cell, tissue, or organStroma, the thick fluid found in between grana, which are stacks of thylakoid disks. The stroma is where the carbohydrate formation reactions occur in the chloroplasts of plant cells undergoing photosynthesis.Stroma (mycology), the dense structural tissue that produces fruiting bodies; made of nonvegetati… (More on Stroma)