| GEA | wheelwork consisting of a connected set of rotating gears by which force is transmitted or motion or torque is changed |
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| GEA | wheelwork consisting of a connected set of rotating gears by which force is transmitted or motion or torque is changed |
| GEA | a set of gears |
| GEA | a mechanical device for engaging and disengaging gears |
| GEA | a mechanical device for engaging and disengaging gears |
| GEA | wheelwork consisting of a connected set of rotating gears by which force is transmitted or motion or torque is changed |
| GEA | a family of earthstar fungi belonging to the order Lycoperdales |
| GEA | type genus of Geastraceae |
| GEA | an earthstar with a bluish spore sac and a purplish brown gleba |