韧皮部 Traditional form: 韌皮部 Pinyin (reading): rènpíbù Definitions: phloem Characters: 韧 - tough, strong; pliable 皮 - skin, hide, fur, feathers 部 - department, ministry; division, unit; part, section Traditional characters: 韌 - tough, strong; pliable 皮 - skin, hide, fur, feathers 部 - department, ministry; division, unit; part, section