ventiport
n.— «Buick’s vents also build on brand history. The company has a long tradition of “ventiports,” commonly called portholes, dating to the 1930’s. The vents on the new Lucerne send a message: three per side indicate a six-cylinder engine under the hood; four on a side signals eight cylinders.» —“Luxury-Car Designers Decide Now Is the Perfect Time to Vent” by Phil Patton New York Times July 16, 2006. (source: Double-Tongued Dictionary)