in·tus·sus·cept [ ìntəssə sépt ](past and past participlein·tus·sus·cept·ed, present participlein·tus·sus·cept·ing, 3rd person present singularin·tus·sus·cepts)
transitive and intransitive verb
Definition:
telescope into itself: to cause part of a tubular structure to slide partially into itself, e.g. as part of the intestine sometimes does