Stro·ma n.; pl. Stromata
1. Anat. (a) The connective tissue or supporting framework of an organ; as, the stroma of the kidney. (b) The spongy, colorless framework of a red blood corpuscle or other cell.
2. Bot. A layer or mass of cellular tissue, especially that part of the thallus of certain fungi which incloses the perithecia.
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stroma
n 1: the dense colorless framework of a chloroplast
2: the supporting tissue of an organ (as opposed to parenchyma)
[also: stromata (pl)]