Tetrapneumona

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Tetrapneumona \Tet`rap*neu"mo*na\, n. pl. [NL. See {Tetra-}, and
     {Pneumo-}.] (Zool.)
     A division of Arachnida including those spiders which have
     four lungs, or pulmonary sacs. It includes the bird spiders
     ({Mygale}) and the trapdoor spiders. See {Mygale}.
     [1913 Webster]