
1) Imax forerunner 2) Movie format of old 3) Precursor to IMAX 4) Super Panavision predecessor 5) Wide-screen movie format 6) Wide-screen movie process 7) Wide-screen process
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https://www.crosswordclues.com/clue/cinerama

Cinerama is a widescreen process that, originally, simultaneously projected images from three synchronized 35 mm projectors onto a huge, deeply curved screen, subtending 146° of arc.{clarify|date=June 2013} The trademarked process was marketed by the Cinerama corporation. It was the first of a number of novel processes introduced during the 1950s...
Found on
http://en.wikipedia.org/wiki/Cinerama

A wide-screen filming process that first used three cameras and three projectors to achieve an encompassing view of the subject matter. The cameras were positioned conjointly so as to record data in breadth with one camera facing straight ahead and the other two cameras filming in coordinates of camera-right and camera-left. The full angle achieved...
Found on
http://www.allmovie.com/glossary/term/cinerama

in motion pictures, a process in which three synchronized movie projectors each project one-third of the picture on a wide, curving screen. Many ... [2 related articles]
Found on
http://www.britannica.com/eb/a-z/c/86

Wide-screen process devised in 1937 by Fred Waller of Paramount's special-effects department. Originally three 35-mm cameras and three projectors were used to record and project a single image. Three aspects of the image were recorded and then projected on a large curved screen, with the result that the images blended together to pr...
Found on
https://www.encyclo.co.uk/local/21221

a wide-screen process using three adjacent, synchronized cameras for photographing and three corresponding projectors for showing the film.
Found on
https://www.infoplease.com/dictionary/cinerama
No exact match found.