From The Collaborative International Dictionary of English v.0.48 :
Pursual \Pur*su"al\, n.
The act of pursuit. [R.]
[1913 Webster]
From WordNet (r) 3.0 (2006) :
pursual
n 1: the act of pursuing in an effort to overtake or capture;
"the culprit started to run and the cop took off in
pursuit" [syn: pursuit, chase, pursual, following]