mesenteron
Concise Oxford English Dictionary © 2008 Oxford University Press:
mesenteron /mɪˈsɛntərɒn/
▶noun Zoology the middle section of the intestine, especially in an embryo or arthropod.
– origin C19: from Gk mesos ‘middle’ + enteron ‘intestine’.
'mesenteron' also found in these Oxford entries:

