4.5-Inch Beach Barrage Rocket 4.5-Inch Beach Barrage Rocket /ˌfoʊr ˌfaɪv ɪntʃ ˈbiːtʃ bəˈrɑːdʒ ˈrɒkɪt/

noun

1. A geyser in Yellowstone National Park that erupts for about 4 minutes about every 65 minutes  ( Old Faithful , 4.5-Inch Beach Barrage Rocket )
   a geyser in Yellowstone National Park that erupts for about 4 minutes about every 65 minutes