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.
Visit the Skydeck and gaze down over the Chicago cityscape from a dazzling 1,353 feet above the sidewalk. Willis Tower, the tallest building in the US, is a 1,450-foot modern office block that offers unrivalled views of Chicago. Ride the elevators to the 103rd floor Skydeck, 1,353 feet above the sidewalks to check out a viewing platform and small museum.