mesosoma
From ZooTerms (Dictionary of Invertebrate Zoology)
mesosoma (noun; Greek mesos, middle; soma, body): 1. The middle part of an invertebrate's body.
2. (Arthropoda: Chelicerata) In Arachnida, the anterior portion of the abdomen, often clearly set off from the metasoma.
3. (Arthropoda: Insecta) For Hymenoptera, see alitrunk.
4. (Pogonophora) The short frenular region of the body.
