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Meaning of Sangamon

San•ga•mon

Pronunciation: (sang'gu-mun), [key]
— n. Geol.
  1. the third interglacial stage of the Pleistocene Epoch in North America, after the Illinoian glacial stage and before the Wisconsin.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.