Mesophyll is a term that refers to the tissue present in the interior of a leaf of a plant. It is responsible for performing significant functions like photosynthesis, carbon dioxide fixation, and providing structural support to the plant. A few synonyms for mesophyll could include 'parenchyma', which refers to the living tissue of an angiosperm, 'spongy tissue', which describes the airy layer of cells in a plant, 'ground tissue', which denotes the mass of non-vascular plant tissue responsible for supporting plant growth, and 'chlorenchyma', which is a type of parenchyma found in chloroplast-rich tissue. By understanding the synonyms, one can easily comprehend the intricate details of plant biology.