| Gy | a Greek sandwich: sliced roast lamb with onion and tomato stuffed into pita bread |
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| Gy | a navigational instrument based on a gyroscope |
| Gy | a compass that does not depend on magnetism but uses a gyroscope instead |
| Gy | any fungus of the genus Gyromitra |
| Gy | a lorchel with deep brownish red fertile part and white stalk |
| Gy | a gyromitra with a brown puffed up fertile part and a thick fluted stalk |
| Gy | a poisonous gyromitra |
| Gy | a lorchel with deep brownish red fertile part and white stalk |
| Gy | a gyromitra with a large irregular stalk and fertile part that is yellow to brown and wrinkled |
| Gy | a poisonous fungus |
| Gy | a gyromitra with a brown puffed up fertile part and a rosy pink fluted stalk and smooth round spores |
| Gy | an aircraft that is supported in flight by unpowered rotating horizontal wings (or blades) |