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.
Hereâs some background information about Willis Tower, located in Chicago. Formerly the Sears Tower, it is now named for its tenants, the Willis Group Holdings. The visitorsâ observation deck, called the âSkydeck,â is located on the 103rd floor. Other Info: The Sears Tower was the worldâs tallest building until 1996, when it was surpassed by the Petronas Twin Towers.