noun, plural: stromata
(2) (anatomy) The supporting framework of an organ, a gland or other structure, usually composed of connective tissue cells, as distinguished from the parenchyma cells or tissues performing the special function of the organ or bodily part.
(3) (botany) The matrix of the chloroplast which is a thick fluid in between grana where various enzymes, molecules and ions are found, and where the dark reaction (or carbohydrate formation reactions) of photosynthesis occurs.
Word origin: Late Latin strōma, mattress, covering, from Greek, bed.
Related forms: stromal (adjective)