phloem
noun /ˈfləʊem/
/ˈfləʊem/
[uncountable] (biology- the material in a plant containing very small tubes that carry sugars produced in the leaves around the plant
compare xylem韧皮部(由筛管等将叶制造的糖分输送到各部位的植物组织) 词源late 19th cent.: from Greek phloos ‘bark’ + the passive suffix -ēma.