Johann Christian Reil (20 February 1759, Rhaude (an urban destrict of Rhauderfehn) – 22 November 1813, Halle an der Saale) was a German physician, physiologist, anatomist  and psychiatrist. He coined the term psychiatry or, in German, Psychiatrie in 1808.

Runway end identifier lights (REIL) are installed at many airports to provide rapid and positive identification of the approach end of a particular runway. The system consists of a pair of synchronized flashing lights located laterally on each side of the runway threshold. REILs may be either omnidirectional or unidirectional facing the approach area. They are effective for:

• Identification of a runway surrounded by a preponderance of other lighting
• Identification of a runway which lacks contrast with surrounding terrain
• Identification of a runway during reduced visibility