a device similar to radar in principle and operation but using infrared laser light instead of radio waves and capable of detecting particles and varying physical conditions in the atmosphere.
li·dar (lī'där) n.
In both senses also called laser radar.
A method of detecting distant objects and determining their position, velocity, or other characteristics by analysis of pulsed laser light reflected from their surfaces.
A method of detecting distant objects and determining their position, velocity, or other characteristics by analysis of pulsed laser light reflected from their surfaces. Lidar operates on the same principles as radar and sonar.
[lahy-dahr] 
dɑr