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.
Image Â© SOM. Willis Tower (formerly Sears Tower) consists of a structural steel frame that was pre-assembled in sections and then bolted in place on the site. The lightweight building skin â a black aluminum and bronze-tinted glare-reducing glass curtain wall â