'Stroma' definitions:

Definition of 'stroma'

From: WordNet
noun
A mass of fungal tissue that has spore-bearing structures embedded in it or on it
noun
The dense colorless framework of a chloroplast
noun
The supporting tissue of an organ (as opposed to parenchyma)

Definition of 'Stroma'

From: GCIDE
  • Stroma \Stro"ma\, n.; pl. Stromata. [L., a bed covering, Gr. ? a couch or bed.]
  • 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. [1913 Webster]
  • 2. (Bot.) A layer or mass of cellular tissue, especially that part of the thallus of certain fungi which incloses the perithecia. [1913 Webster]