Usually means: Pertaining to the heart's upper chambers.
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We found 24 dictionaries that define the word atrial:

General (16 matching dictionaries)
  1. atrial: Merriam-Webster
  2. atrial: Oxford Learner's Dictionaries
  3. atrial: American Heritage Dictionary of the English Language
  4. atrial: Collins English Dictionary
  5. atrial: Vocabulary.com
  6. Atrial, atrial: Wordnik
  7. atrial: Wiktionary
  8. atrial: Dictionary.com
  9. Atrial: Wikipedia, the Free Encyclopedia
  10. Atrial: Online Plain Text English Dictionary
  11. atrial: Webster's Revised Unabridged, 1913 Edition
  12. atrial: Rhymezone
  13. Atrial: AllWords.com Multi-Lingual Dictionary
  14. atrial: FreeDictionary.org
  15. atrial: Mnemonic Dictionary
  16. atrial: TheFreeDictionary.com

Computing (1 matching dictionary)
  1. atrial: Encyclopedia

Medicine (7 matching dictionaries)
  1. atrial: Merriam-Webster Medical Dictionary
  2. Dorland's Illustrated Medical Dictionary (No longer online)
  3. Atrial: MedTerms.com Medical Dictionary
  4. online medical dictionary (No longer online)
  5. atrial: Medical dictionary
  6. PERFUSION TECHNOLOGY, OPEN HEART SURGERY AND CARDIOLOGY (No longer online)
  7. Atrial: Drug Medical Dictionary

(Note: See atrium as well.)

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Definitions from Wiktionary (atrial)

▸ adjective:  Of or pertaining to an atrium, especially the atrium of the heart.

Similar:
uniatrial, atrialized, visceroatrial, ventriculoatrial, cavoatrial, atriocaval, atriopulmonary, venoatrial, atriofascicular, atriohisian, more...

Opposite:
ventricular, systemic, peripheral, external, distal

Phrases:
atrial fibrillation, Atrial flutter, Atrial tachycardia, atrial contraction, atrial septum, more...

Adjectives:
left, right, premature, paroxysmal, rapid, human, ectopic, simultaneous, normal, single, temporary

Colors:
    red,     crimson,     scarlet,     burgundy,     maroon, more...

▸ Words similar to atrial

▸ Usage examples for atrial

▸ Idioms related to atrial

▸ Wikipedia articles (New!)

▸ Popular nouns described by atrial

▸ Words that often appear near atrial

▸ Rhymes of atrial

▸ Invented words related to atrial

Similar:
uniatrial, atrialized, visceroatrial, ventriculoatrial, cavoatrial, atriocaval, atriopulmonary, venoatrial, atriofascicular, atriohisian, more...

Opposite:
ventricular, systemic, peripheral, external, distal

Phrases:
atrial fibrillation, Atrial flutter, Atrial tachycardia, atrial contraction, atrial septum, atrial appendage, atrial arrhythmias, atrial myxoma, atrial systole, atrial conduction, atrial filling, more...

Adjectives:
left, right, premature, paroxysmal, rapid, human, ectopic, simultaneous, normal, single, temporary

Colors:
    red,     crimson,     scarlet,     burgundy,     maroon, more...



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