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Webster 1913 Edition

Tetrapneumona

‖

Tetˊrap-neu′mo-na

,

Noun.

pl.

[NL. See

, and

.]

(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

.