#isthmus  a relatively narrow strip of land (with water on both sides) connecting two larger land areas
  supertype:  dry_land__dryland__land__earth__solid_ground__solidground__terrafirma  the solid part of the earth's surface; "the plane turned away from the sea and moved back over land"; "the earth shook for several minutes"; "he dropped the logs on the ground"
  instance:  Isthmus_of_Panama
  subtype:  Isthmus_of_Corinth  a narrow isthmus between the Gulf of Corinth and the Saronic Gulf; a canal crosses the isthmus so that navigation is possible between the gulfs
  subtype:  Isthmus_of_Kra  a narrow isthmus linking the Malay Peninsula to the Asian mainland
  subtype:  Isthmus_of_Suez__isthmusofsuez  the isthmus in northeastern Egypt that connects Africa and Asia
  subtype:  Isthmus_of_Tehuantepec  the narrowest part of southern Mexico is an isthmus between the Bay of Campeche on the north coast and the Gulf of Tehuantepec on the south coast
  subtype:  Karelian_Isthmus  the isthmus between the Gulf of Finland and Lake Ladoga that connects Finland and Russia

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