Sagan

Etymology 1
The unit is derived from the phrase "billions and billions (of stars)", erroneously attributed to the American astronomer Carl Sagan. The lower bound of such a number must be two billion plus two billion, or four billion. popularized the phrase through his occasional impersonation of Sagan throughout his career.

Derived terms

 * Sagan

Noun

 * 1)  A unit of measurement equal to at least four billion.

Proper noun

 * 1) A village in Sardasht Rural District, in the Central District of Bashagard County, Hormozgan Province, Iran.

Proper noun

 * 1) A river in southern Ethiopia.
 * 2) A town in southern Ethiopia, named for the river.
 * 1) A town in southern Ethiopia, named for the river.
 * 1) A town in southern Ethiopia, named for the river.

Etymology
From.