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.
The building was renamed Willis Tower in July 2009 as the company consolidated five local offices and brought together some 500 Associates. Click here for the press release announcing Willisâ plans to move into the building and its agreement to secure naming rights for the Tower.