IGY
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IGY may refer to:
- Immunoglobulin Y (IgY), a type of antibody found in birds but not mammals
- International Geophysical Year (I. G. Y.)
- "I.G.Y. (What a Beautiful World)", a 1982 song by Donald Fagen
- Israel Gay Youth
- Ingenuity (helicopter) (ICAO operator code:
IGY), NASA defunct solar-powered autonomous drone helicopter on Mars
See also
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