| Term | Definition |
| chloroplast | organelle found in some plant cells and certain unicellular organisms where photosynthesis takes place |
| thylakoid | disk shaped sac in the stroma of cholorplasts; site of light reactions in photosynthesis |
| stroma | thick fluid contained in the inner membrane of a chloroplast |
| granum | a stack of thykaloids |
| photosynthesis | a conversion of light energy from the sun to chemical energy stored in sugars and other organic compounds |
| chlorophylls | pigment that gives chloroplasts its green color |
| chlorophyll | . |
| chloroplast | . |
| granum | . |
| thylakoid | . |
| photosynthesis | . |
| stroma | . |
| inner and outer membrane | envelope that encloses chloroplast cell |