Definition of mesorectum in US English:

mesorectum

noun

Anatomy Zoology
  • The mesentery or peritoneal investment of the rectum; the tissue between the rectum and the sacrum.

Origin

Late 18th century; earliest use found in Everard Home (1756–1832), surgeon. From meso- + rectum.

Pronunciation

mesorectum

/ˌmɛsə(ʊ)ˈrɛktəm/