| GRO | underground water that is held in the soil and in pervious rocks |
|---|---|
| GRO | a radio wave propagated on or near the earth's surface |
| GRO | aircraft landing in bad weather in which the pilot is talked down by ground control using precision approach radar |
| GRO | a craft capable of moving over water or land on a cushion of air created by jet engines |
| GRO | an explosive mine hidden underground |
| GRO | on the floor closest to level with the ground |
| GRO | at surface level |
| GRO | the crew of technicians and mechanics who service aircraft on the ground |
| GRO | huge herbivorous dinosaur of the Cretaceous found in western North America |
| GRO | creeping shrub of eastern North America having white bell-shaped flowers followed by spicy red berrylike fruit and shiny aromatic leaves that yield wintergreen oil |
| GRO | small prostrate or ascending shrub having scarlet flowers and succulent fruit resembling cranberries |
| GRO | the ceremonial breaking of the ground to formally begin a construction project |