stroma

The connective tissue framework of an organ, gland, or other structure, as distinguished from the tissues performing the special function of the organ or part.

The spongy, colorless framework of a red blood cell or other cell.

The colorless semiliquid material inside a chloroplast, in which the thylakoid membranes are embedded and where the dark reactions of photosynthesis occur.

A dense mass of fungal hyphae on or in which reproductive structures develop.

In anatomy: The sustentacular tissue or substance of a part or organ, usually of connective tissue.

In botany: In fungi, a variously shaped more or less continuous layer of cellular tissue, in which perithecia or other organs of fructification are immersed. Sometimes called receptacle. See cut under ergot.

In vegetable physiology, the solid matter remaining after all the fluid has been expressed from protoplasm.

The connective tissue or supporting framework of an organ.

The spongy, colorless framework of a red blood corpuscle or other cell.