Medical Definition of dorsiflexion. : flexion in a dorsal direction; especially : flexion of the foot in an upward directionâcompare plantar flexion.
Willis Tower. The Willis Tower, built as and still commonly referred to as Sears Tower, is a 108-story, 1,450-foot (442.1 m) skyscraper in Chicago, Illinois, United States.
It was the tallest building in the world for 25 years until the Petronas Towers in Kuala Lampur, Malaysia took this honor. The Willis Tower still holds the title as the tallest building in the Western Hemisphere, though, and itâs the seventh tallest building in the world. It holds more than 3.8 million square feet of office space. Don't miss one of the highlights of the Skydeck, the glass ledge which juts out from the side of the building.