D defs.my
Entry 1 sense Webster, 1913

Palpitation

/pălˌ-pət-āsh'-ən/ · Pal·pi·ta·tion · IPA /ˌpælpɪˈteɪʃən/
01 n. A rapid pulsation; a throbbing; esp., an abnormal, rapid beating of the heart as when excited by violent exertion, strong emotion, or by disease.
  1. 1.
    A rapid pulsation; a throbbing; esp., an abnormal, rapid beating of the heart as when excited by violent exertion, strong emotion, or by disease.