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*n]* - Greek mathematician and astronomer who estimated the circumference of the earth and the distances to the moon and sun (276-194 BC)

Found on http://www.webdictionary.co.uk/definition.php?query=Eratosthenes

Around 230BC developed a method for finding all prime numbers. See also: Prime Numbers.

Found on http://www.diracdelta.co.uk/science/source/e/r/eratosthenes/source.html

*noun* Greek mathematician and astronomer who estimated the circumference of the earth and the distances to the moon and sun (276-194 BC)

Found on https://www.encyclo.co.uk/local/20974

Greek geographer and mathematician whose map of the ancient world was the first to contain lines of latitude and longitude, and who calculated the Earth's circumference with an error of about 10%. His mathematical achievements include a method for duplicating the cube, and for finding prime numbers (Eratosthenes' sieve). No work of Erat...

Found on http://www.talktalk.co.uk/reference/encyclopaedia/hutchinson/m0003705.html

*[statesman]* Eratosthenes of Athens was one of the Thirty Tyrants elected to rule the city of Athens after the Peloponnesian War (431–404 BC). Having lost the war to the Spartans, the citizens of Athens elected thirty men as oligarchs. The Thirty instituted oppressive and highly exclusionary laws and instituted a political purge against At...

Found on http://en.wikipedia.org/wiki/Eratosthenes_(statesman)

*[crater]* Eratosthenes is a relatively deep lunar impact crater that lies on the boundary between the Mare Imbrium and Sinus Aestuum mare regions. It forms the western terminus of the Montes Apenninus mountain range. The crater has a well-defined circular rim, terraced inner wall, central mountain peaks, an irregular floor, and an outer ramp...

Found on http://en.wikipedia.org/wiki/Eratosthenes_(crater)

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