arachnida

英[ə'ræknɪdə] 美[ə'ræknɪdə]
  • 蛛形纲
  • class n.等级;阶级;阶层;班级;课;[生]纲;出色的风度v.分类
  • variable adj.可变的;易变的n.变量;易变的东西
Noun:
  1. a large class of arthropods including spiders and ticks and scorpions and daddy longlegs; have four pairs of walking legs and no wings