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 (ā-zī′gəs) Anatomy
adj. also a·zy·gous (-gəs)
Not one of a pair, as a vein or muscle; occurring singly.
An unpaired anatomical structure.

[Greek : a-, a- + -zugos, yoked (from zugon, yoke, pair; see yeug- in Indo-European roots).]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(Biology) biology developing or occurring singly
[C17: via New Latin from Greek azugos, from a-1 + zugon yoke]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˈæz ə gəs, eɪˈzaɪ-)

adj. Biol.
not being one of a pair; single.
[1640–50; < Greek ázygos=a- a-6 + -zygos, derivative of zygón yoke]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.azygous - occurring singlyazygous - occurring singly; not one of a pair; "the azygous muscle of the uvula"
anatomy, general anatomy - the branch of morphology that deals with the structure of animals
single - existing alone or consisting of one entity or part or aspect or individual; "upon the hill stood a single tower"; "had but a single thought which was to escape"; "a single survivor"; "a single serving"; "a single lens"; "a single thickness"
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
Hemi-azygous vein runs in posterior mediastinum with a small horizontal communication with azygous vein at 9th thoracic vertebra.
(2) With severe SVC baffle obstruction, a dilated azygous system can be sought.
Murri, "Bilateral medial frontal infarction in a case of azygous anterior cerebral artery stenosis," Italian Journal of Neurological Sciences, vol.
Important anatomic considerations in the posterior mediastinum include the descending thoracic aorta, trachea, esophagus, azygous venous system, and potential spinal involvement.
There was one patient with complete absence of IVC with azygous continuation.
It continues between the aorta and azygous vein until it reaches the fifth thoracic vertebrae.
Invasive strategies in management of high DFT identify: use of high output ICD device, altering the shock vector through RV lead repositioning, manipulation of the superior vena cava coil, additional coil implantation in the azygous vein, coronary sinus and epicardial space or addition of subcutaneous arrays, the latter rarely used nowadays [18, 19].
Lt sided IVC was found draining in hepatic sinusoids on Rt side and ultimately draining in right atrium (RA) via hepatic veins, Rt sided IVC was draining in RSVC via Azygous continuation (fig-3).
Within the abdomen, the thoracic duct ascends along the anterior surface of the lumbar vertebra, between the aorta and azygous vein, to enter the thorax via the aortic hiatus in the posterior mediastinum.
Alzoum, "Multidetector computed tomography evaluation of cavernous haemangioma of the azygous vein," Interactive Cardiovascular and Thoracic Surgery, vol.
For example, MRI derived hepatic blood flow parameters and azygous flow have been shown to correlate with portal pressure [10] and variceal size [11], respectively.
Wallace, "Absence of hepatic segment of the inferior vena cava with azygous continuation," Journal of Computer Assisted Tomography, vol.