lis mota

from Bouvier's Law Dictionary, Revised 6th Ed (1856)
LIS MOTA. The cause of the suit or action. By this term is understood the 
commencement of the controversy, and the beginning of the suit. 4 Campb. R. 
417; 6 Carr. & P. 552, 561; 2 Russ. & My. 161; Greenl. Ev. Sec. 131, 132. 
    

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