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 Petronas Twin Towers in Kuala Lumpur, Malaysia, were the tallest buildings from 1998 to 2004, and are still the tallest twin buildings. Willis Tower, formerly Sears Tower, in Chicago, United States was the tallest building from 1974 to 1998.