— perturbational , adj.
/perr'teuhr bay"sheuhn/ , n.
1. the act of perturbing.
2. the state of being perturbed.
3. mental disquiet, disturbance, or agitation.
4. a cause of mental disquiet, disturbance, or agitation.
5. Astron. deviation of a celestial body from a regular orbit about its primary, caused by the presence of one or more other bodies that act upon the celestial body.
[ 1325-75; perturbation- (s. of perturbatio; see PERTURB, -ATION); r. ME perturbacioun ]