||Tet`rap*neu"mo*na (?), n. pl. [NL. See
Tetra-, and Pneumo-.] (Zoöl.) 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.
||Tet`rap*neu"mo*na (?), n. pl. [NL. See
Tetra-, and Pneumo-.] (Zoöl.) 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.