protophloem

n. [植]原生韧皮部

词形变化

protophloems 复数 protophloems

释义与例句

n.
  1. 1.

    The form of phloem that is initially formed, composed of narrow, thin-walled cells.

    可数 不可数 生物 植物学

词源

From proto- + phloem.

来源：wiktionary