palpitation

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pal·pi·tate / ˈpalpiˌtāt/ • v. [intr.] [often as adj.] (palpitating) (of the heart) beat rapidly, strongly, or irregularly: it wakened him in the night with a palpitating heart. ∎  shake; tremble: she was palpitating with terror.

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pal·pi·ta·tion / ˌpalpiˈtāshən/ • n. (usu. palpitations) a noticeably rapid, strong, or irregular heartbeat due to agitation, exertion, or illness.

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palpitate XVII. f. pp. stem of L. palpitāre, frequent. of palpāre stroke; see PALPABLE, -ATE3.
So palpitation XVII. — L.

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palpitation (pal-pi-tay-shŏn) n. an awareness of the heartbeat. This is normal with fear, emotion, or exertion. It may also be a symptom of neurosis, arrhythmias, heart disease, and overactivity of the circulation.

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