peritrophic
/ˌpɛrɪˈtrɒfɪk/ /ˌpɛrɪˈtrəʊfɪk/Zoology
adjective
Relating to or designating a chitinous tube or membrane that lines the gut of many insects and some crustaceans, and is wrapped around faeces when they are expelled.
Origin
Early 20th century; earliest use found in Louis Miall (1842–1921). From peri- + trophic, after French péritrophique.