Look up: water-hole

1. 
   water hole
   [n] - a natural hole or hollow containing water
   Found on http://www.webdictionary.co.uk/definitio
   
   
2. 
   water hole
   noun a natural hole or hollow containing water
   Found on http://wordnet.princeton.edu/perl/webwn?
   
   
3. 
   Water Hole
   In SETI, the `Water Hole` is the band of radio frequencies between 1420 MHz and 1640 MHz. This is the band between the hydrogen line and the strongest hydroxyl spectral line, and is notable because it is a quiet region between two notable frequencies; it is theorized that this would be a good band for communications to or from extraterrestrial intelligences. The term was coined by Bernard Oliver. The combination of hydrogen and hydroxyl yields w...
   Found on http://en.wikipedia.org/wiki/Water_Hole
   
   
4. 
   Waterhole
   A `waterhole`, can refer to: * In Australia, a waterhole is a permanent source of water, particularly in the desert. It is usually a deep hole in rock that has filled with rainwater or is fed by the Great Artesian Basin, water beneath the ground in Central Australia. Knowledge of waterhole locations was very important to Australian Aborigines' survival in the desert. * In Africa, it is a semi-artificial body of water. Through the action of topo...
   Found on http://en.wikipedia.org/wiki/Waterhole
   
   
5. 
   waterhole
   The radio frequency band between the neutral hydrogen line at 1,420 MHz (21-centimeter line) and the hydroxyl (OH) line at 1,662 MHz. It lies in a part of the radio spectrum in which there is relatively little noise from natural celestial sources, so that a directional transmitter of only modest pow...
   Found on http://www.daviddarling.info/encyclopedi