| The American Heritage® Dictionary of the English Language: Fourth Edition. 2000. |
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| arrhythmia |
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| SYLLABICATION: | ar·rhyth·mi·a |
| PRONUNCIATION: |   -r th m - |
| NOUN: | An irregularity in the force or rhythm of the heartbeat. | | ETYMOLOGY: | New Latin, from Greek arruthmi , lack of rhythm, from arruthmos, unrhythmical : a-, without; see a–1 + rhuthmos, rhythm; see rhythm.
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| The American Heritage® Dictionary of the English Language, Fourth Edition. Copyright © 2000 by Houghton Mifflin Company. Published by the Houghton Mifflin Company. All rights reserved. |
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