1. The first or anterior segment of the thorax in insects.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• orothorax,
• lrothorax,
• -rothorax,
• 0rothorax,
• peothorax,
• pdothorax,
• pfothorax,
• ptothorax,
• p5othorax,
• p4othorax,
• prithorax,
• prkthorax,
• protorax,
• protruran,
• protturan,
• protecrix,
• protrax,
• prochoron,
• Protoham,
• Proterax

• prather,
• pretor,
• protractor,
• protracted,
• Prothro,
• proturan,
• prater,
• protractile,
• pretoria,
• protraction,
• protract,
• protura.

The adjective form of the word "prothorax" is "prothoracic".

The plural of the "prothorax" can be the "prothoraxes".

The singular of the "prothorax" can be the "prothorax".