Dictionary.com
Thesaurus.com

teleran

American  
[tel-uh-ran] / ˈtɛl əˌræn /

noun

(sometimes initial capital letter)
  1. a navigational aid that uses radar to map the sky above an airfield, which, together with a map of the airfield itself, is transmitted by television to aircraft approaching the field.


Teleran British  
/ ˈtɛləˌræn /

noun

  1. an electronic navigational aid in which the image of a ground-based radar system is televised to aircraft in flight so that a pilot can see the position of his aircraft in relation to others

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of teleran

1945–50; short for Tele(vision) R(adar) A(ir) N(avigation)