palpitation

[pal-pi-tey-shuhn]
noun
1.
the act of palpitating.
2.
an unusually or abnormally rapid or violent beating of the heart.

Origin:
1595–1605; < Latin palpitātiōn- (stem of palpitātiō) a throbbing. See palpitate, -ion

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World English Dictionary
palpitate (ˈpælpɪˌteɪt)
 
vb
1.  (of the heart) to beat with abnormal rapidity
2.  to flutter or tremble
 
[C17: from Latin palpitāre to throb, from palpāre to stroke]
 
'palpitant
 
adj
 
palpi'tation
 
n

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Etymonline
Word Origin & History

palpitation
late 15c., from M.Fr. palpitation, from L. palpitationem (nom. palpitatio), from palpitare "to throb, to flutter," freq. of palpare "touch gently, stroke" (see feel (v.)).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

palpitation pal·pi·ta·tion (pāl'pĭ-tā'shən)
n.
Perceptible forcible pulsation of the heart, usually with an increase in frequency or force, with or without irregularity in rhythm.

The American Heritage® Stedman's Medical Dictionary
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Example sentences
See, in any house where virtue and self-respect abide, the palpitation which the approach of a stranger causes.
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