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"Stroma" Definition

noun

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.
A compact mass of fungal hyphae producing perithecia or pycnidia.
The colorless proteinaceous matrix of a chloroplast in which the chlorophyll-containing lamellae are embedded.
The supporting framework of an animal organ typically consisting of connective tissue.