isthmusDictionary entriesisthmus, isthmi:Masculine · Noun · 2nd declensionFrequency:Lesser= isthmus; strait;Entry →nom. sg.ExamplesLiber XLVTitus Livius (Livy) "...erat tunc praeclara ante excidium; arx quoque et Isthmus praebuere spectaculum: arx intra moenia in immanem altitudinem edita..."