1) Cattle drive oasis 2) Gathering place for animals 
A waterhole or water hole is a depression in the ground in which water can collect. Waterhole or water hole may also refer to: ...
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...