Definition of physogastry in US English:

physogastry

noun

Entomology
  • In certain insects: a condition in which the abdomen becomes distended by the growth of fat bodies or other organs; the distension of the abdomen in this condition.

Origin

1920s; earliest use found in William Morton Wheeler (1865–1937). From physogastr- + -y.

Pronunciation

physogastry

/ˈfʌɪsəʊɡastri/