n. animal tissue that constitutes the essential part of an organ as contrasted with e.g. connective tissue and blood vessels
n. the primary tissue of higher plants composed of thin-walled cells that remain capable of cell division even when mature; constitutes the greater part of leaves, roots, the pulp of fruits, and the pith of stems
n. 实质, 软组织, 薄壁组织
[医] 实质, 主质; 薄壁组织(植物)