rigatonin.

rigatoni (n.)"short, hollow, fluted tubes of pasta," 1930, from Italian rigatooni, plural of rigato, past participle of rigare "to draw a line, to make fluting," from riga "line; something cut out," from a Germanic source, from Proto-Germanic *rigon- (see row (n.1)), from PIE *rei- "to scratch, tear, cut" (see riparian).