progymnosperms

英[prɒdʒɪm'nɒspəmz] 美[prɒdʒɪm'nɒspəmz]
  • 原裸子植物
  • orbit n.势力范围;眼眶;轨迹vt.绕轨道而行;进入轨道vi.盘旋
  • prograde adj.与其他天体作同方向运行的
名词 progymnosperm:
  1. an ancestral fossil type from which modern gymnosperms are thought to have derived