Etymology

From syn- +‎ thoraxCategory:English terms prefixed with syn-#THORAX.

Noun

synthorax (plural synthoraxes or synthoraces)Category:English lemmas#SYNTHORAXCategory:English nouns#SYNTHORAXCategory:English countable nouns#SYNTHORAXCategory:English nouns with irregular plurals#SYNTHORAXCategory:English entries with incorrect language header#SYNTHORAXCategory:Pages with entries#SYNTHORAXCategory:Pages with 1 entry#SYNTHORAX

1. In dragonflies and damselflies, the mesothorax and metathorax when fused together.
   • 1917, R. J. Tillyard, The Biology of Dragonflies‎, 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.

     Category:English terms with quotations#SYNTHORAX