Water does not contain any fiber at all, but does not cause constipation. Neither does water with sugar. Pure fat does not contain any fiber either, whilst it keeps the bowels open. In fact: Too much of anything that does not cause constipation (like sugar and fat), moves the bowels.
Definition of rigatoni for English Language Learners. : a type of pasta that is shaped like short, wide tubes.
Origin and Etymology of rigatoni. Italian, plural, from rigato furrowed, fluted, from past participle of rigare to furrow, flute, from riga line, of Germanic origin; akin to Old High German rÄ«ga line â more at row. First Known Use: circa 1923.