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.
Previously owned by The Boeing Company, one of the worldâs largest aircraft makers, its headquarters is located at the Willis Tower in Chicago, Illinois. It operates in 10 airline hubs in Japan, Guam, and the continental United States.