Definitions
from The Century Dictionary.
- A division of Araneina, or true spiders, having four lungs, four spinnerets, and eight approximated ocelli: distinguished from
Dipneumones . - A group of holothurians, represented by the genus Rhopalodina, having four water-lungs (whence the name). Schmarda. Also called Decacrenidia, Diplostomidea, and Rhopalodinæ.
from the GNU version of the Collaborative International Dictionary of English.
- noun plural (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 .
Etymologies
Sorry, no etymologies found.
Support

Help support Wordnik (and make this page ad-free) by adopting the word tetrapneumona.
Examples
Sorry, no example sentences found.
Comments
Log in or sign up to get involved in the conversation. It's quick and easy.