- palpitation - a rapid and irregular heart beat
--1 is a kind of symptom
Derived forms: verb palpitate1, verb palpitate3 - shaking, shakiness, trembling, quiver, quivering, vibration, palpitation - a shaky motion; "the shaking of his fingers as he lit his pipe"
--2 is a kind of motion
--2 has particulars: tremolo; tremorDerived form: verb palpitate2