Serbonian

• (a.) Relating to the lake of Serbonis in Egypt, which by reason of the sand blowing into it had a deceptive appearance of being solid land, but was a bog.
Found on http://thinkexist.com/dictionary/meaning/serbonian/

Serbonian

Ser·bo'ni·an adjective Relating to the lake of Serbonis in Egypt, which by reason of the sand blowing into it had a deceptive appearance of being solid land, but was a bog. « A gulf profound as that Serbonian bog . . . Where armies whole have sunk.» Milton.
Found on http://www.encyclo.co.uk/webster/S/71
No exact match found