Ground Clutter: A pattern of radar echoes reflecting off fixed ground targets such as buildings or hills near the radar. This may hide or confuse the proper return echo signifying actual precipitation.

 

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Ground Clutter: A pattern of radar echoes reflecting off fixed ground targets such as buildings or hills near the radar. This may hide or confuse the proper return echo signifying actual precipitation.

Grounded Motor: A motor with an electrical connection between the motor frame and ground.

Grounder: A ground ball.

Groundies: A forehand or backhand shot that is executed after the ball bounces once on the court

Ground Water Recharge Area: A location where surface water or precipitation can infiltrate into the ground and replenish the water supply of an aquifer.

Groundhog Day: Groundhogs are suppose to come out of hibernation on February 2 to see how the weather is doing. If the sun is shining and they see a shadow they are said to be frightened and go back inside . . . View Full Definition

Ground Water: Water that exists below the water table in the zone of saturation. Ground water moves slowly in the same direction that the water table slopes.

Ground Speed: The actual speed that an aircraft travels over the ground (its “shadow speed”): it combines the aircraft’s airspeed and the wind velocity relative to the aircraft’s direction of flight.

Ground Rule Double: When a line drive bounces on the field and over the wall in fair territory the hit is scored as a ground rule double and the batter advances to second base.

Ground State: The lowest energy state for an atom or molecule. When an atom is in its ground state, its electrons fill the lowest energy orbitals completely before they begin to occupy higher energy orbit . . . View Full Definition