synthorax

English

Etymology

syn- +‎ thorax

Noun

synthorax (plural synthoraxes or synthoraces)

1. In dragonflies and damselflies, the mesothorax and metathorax when fused together.
   • 1917, R. J. Tillyard, The Biology of Dragonflies‎^[1], Cambridge University Press, archived from the original on 3 July 2017, page 20:

     The meso- and metathorax are large and powerful, and become fused together into one solid mass, which may conveniently be termed the synthorax.