This article is about stroma in biology. For the island, see Stroma, Scotland.

Stroma can refer to:

1. The connective supportive framework of a biological cell, tissue, or organ.
2. The fluid filled area of a chloroplast outside of the thylakoid membranes. The light-independent reactions (Calvin Cycle and Carbon fixation) of photosynthesis take place here.
3. Non-tumor cells (stromal cells) in tumors.

Photosynthesis | Animal anatomy

Stroma | Estroma | Stroma | Stroma | Строма | Stroma (biologia) | Estroma