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Definition

noun, plural: stromata

(1) (cell biology) The spongy, colorless matrix of a cell that functionally supports the cell.

(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.

(4) (mycology) A compact, somatic mass of tissue producing fruiting bodies, and made up of asexual hyphae.

Supplement

Word origin: Late Latin strōma, mattress, covering, from Greek, bed.
Related forms: stromal (adjective)

Related terms:

• Nerve stroma
• Lymphatic stroma
• Rollets stroma
• Stroma glandulae thyroideae
• Stroma iridis