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U.S. Aerospace. Orbiting Astronomical Observatory: one of a series of scientific satellites that studied astronomical phenomena at ultraviolet and x-ray wavelengths.
Words Nearby OAO
- oaky
- Oamaru stone
- O & M
- O and O
- oanshagh
- OAO
- OAP
- OAPC
- OAPEC
- oar
- oared
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
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