mesostethium
/ˌmɛsə(ʊ)ˈstiːθɪəm/Entomology rare
noun
In certain insects: a region of the ventral part of the metathorax, just in front of the coxae of the posterior legs.
Origin
Early 19th century; earliest use found in William Kirby (1759–1850), entomologist and naturalist. From meso- + ancient Greek στῆθος chest + -ium. Compare ancient Greek στηθίον little breast.