progymnosperm

英[prəʊ'dʒɪmnəspɜːm] 美[proʊ'dʒɪmnəspɜːm]
  • 原裸子植物
  • efficiency n.效率;功率
  • progeny n.子孙;结果
  • test n.考验;试验;测试vt.试验;测试;接受测验
Noun:
  1. an ancestral fossil type from which modern gymnosperms are thought to have derived