palpitant
1. [ adjective ] having a slight and rapid trembling motion
Synonyms: palpitating fluttering
Examples:

"a fluttering heartbeat" "palpitant movements rather than violent eruptions" "my palpitating heart"

Related terms: unsteady
Similar spelling:   palpitate
  palpitation
  palpitating
  palpation
  palpate