Irrotational

• (a.) Not rotatory; passing from one point to another by a movement other than rotation; -- said of the movement of parts of a liquid or yielding mass.
Found on http://thinkexist.com/dictionary/meaning/irrotational/

Irrotational

Ir`ro·ta'tion·al adjective (Physics) Not rotatory; passing from one point to another by a movement other than rotation; -- said of the movement of parts of a liquid or yielding mass. Sir W. Thomson.
Found on http://www.encyclo.co.uk/webster/I/100
No exact match found