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Oleg [oh-leg] /ˈoʊ lɛg/ (Show IPA), (Oleg Cassini-Loiewski) 1913–2006, U.S. fashion designer and businessman, born in France.
a walled plain in the first quadrant of the face of the moon: about 36 miles (56 km) in diameter.
Geometry. oval of Cassini.
Contemporary Examples

And Cassini, like other first lady clothiers, was not a big international brand.
How Oscar de la Renta Created First Lady Fashion Raquel Laneri October 20, 2014

That brings us back to the cloud system monitored by the Cassini mission between July 20 and 22.
A Cloud Forms Over Saturn’s Mysterious Moon Matthew R. Francis August 16, 2014

The authors of the new study used data from the Cassini probe orbiting Saturn to measure the libration of Mimas.
Saturn’s Death Star Look-Alike Matthew R. Francis October 18, 2014

Historical Examples

Cassini observed, by the position of certain spots, the revolution of the planet Venus on its axis.
The Every Day Book of History and Chronology Joel Munsell

Cassini states that the ovaria on the circumference and centre of Compos.
More Letters of Charles Darwin Volume II Charles Darwin

I made the remark one day to the Marquis de Cassini, a philosopher and pupil of the great Buffon.
Blackwood’s Edinburgh Magazine, No. CCCXLII. Vol. LV. April, 1844 Various

Cassini was right in saying that cartography was no longer at its height as a science.
Celebrated Travels and Travellers Jules Verne

They were observed and delineated by the leading astronomers of the 16th century, especially Huygens, Cassini and Hooke.
Encyclopaedia Britannica, 11th Edition, Volume 17, Slice 7 Various

Cassini, an Italian astronomer, discovered the satellite of Venus.
The Every Day Book of History and Chronology Joel Munsell

These were discovered respectively by Huyghens in 1655 and by Cassini in 1671.
Astronomy of To-day Cecil G. Dolmage

noun
Giovanni Domenico. 1625–1712, French astronomer, born in Italy. He discovered (1675) Cassini’s division, the gap that divides Saturn’s rings into two parts, and four of Saturn’s moons