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.
But as of Tuesday, that crown is moving east. One World Trade Center in Lower Manhattan has officially been ruled to be taller than the Willis Tower, in Chicago. That judgment came from the primary arbiter of structural stature, the Council on Tall Buildings and Urban Habitat.