Advertisement
Advertisement
OAO
- U.S. Aerospace. Orbiting Astronomical Observatory: one of a series of scientific satellites that studied astronomical phenomena at ultraviolet and x-ray wavelengths.
Advertisement
Word of the Day
[tawr-choo-uhs ]
Meaning and examplesStart each day with the Word of the Day in your inbox!
By clicking "Sign Up", you are accepting Dictionary.com Terms & Conditions and Privacy Policies.
Advertisement
Advertisement
Advertisement
Browse