from The American Heritage® Dictionary of the English Language, 5th Edition.

  • adjective Not one of a pair, as a vein or muscle; occurring singly.
  • noun An unpaired anatomical structure.

from The Century Dictionary.

  • noun An azygous part, as a muscle, vein, etc.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun anatomy, medicine In anatomy, a structure that is unpaired. This is relatively unusual, as most elements of anatomy reflect bilateral symmetry.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adjective occurring singly; not one of a pair


from The American Heritage® Dictionary of the English Language, 4th Edition

[Greek : a-, a- + -zugos, yoked (from zugon, yoke, pair; see yeug- in Indo-European roots).]

from Wiktionary, Creative Commons Attribution/Share-Alike License

From the Ancient Greek άνισος.


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  • Comparing Aurobindo to worshippers of Saguna Brahman is a gross mistake....according to him the supreme is above both saguna and nirguna brahman..even Swami Vivekananda never remarked that the nirguna was highest, and nothing could be beyond it, his only contention like other advaitics was nirguna is higher than saguna azygos #61059 - 01/18/06 10:54 AM Advaita Philosophy Advaita Discussion

    Sri Aurobindo is quite "liberal" Tusar N Mohapatra 2006

  • The general median line of the human body is characterized as the point of fusion of the two sides; and all structures or organs which range this common centre are either symmetrically azygos, or symmetrically duplex.

    Surgical Anatomy Joseph Maclise

  • He discovered the valve which guards the _foramen ovale_ in the fœtus; and he not only verified the observation of Etienne as to the valve-like fold guarding the entrance of each hepatic vein into the inferior vena cava, but he also fully described the _vena azygos_.

    Fathers of Biology Charles McRae

  • Every branch of the aorta which ramifies upon the abdominal parietes has its accompanying vein returning either to the vena cava or the vena azygos, and entering either of these vessels at a point on the same level as that at which itself arises.

    Surgical Anatomy Joseph Maclise

  • But what earthly use has a man for valves in the intercostal veins which carry blood almost horizontally backward to the azygos veins?

    Scientific American Supplement, No. 447, July 26, 1884 Various

  • At this latter situation it is in immediate contact with the posterior thick part of the left lung; whilst on its right are placed, L, the thoracic duct; I, the oesophagus; K, the vena azygos, and the vertebral column.

    Surgical Anatomy Joseph Maclise

  • The azygos organ presents as a symmetrical unity, and the duplex organ as a symmetrical duality.

    Surgical Anatomy Joseph Maclise

  • E, great azygos vein crossing œsophagus and right bronchus to empty into the superior vena cava;

    A Practical Physiology Albert F. Blaisdell

  • The portion of the right primitive jugular vein between the left innominate and the azygos vein forms the upper part of the superior vena cava of the adult; the lower part of this vessel, i.e., below the entrance of the azygos vein, is formed by the right Cuvierian duct.

    V. Angiology. 3. Development of the Vascular System 1918

  • Above the level of the renal veins the right cardinal vein persists as the azygos vein and receives the right intercostal veins, while the hemiazygos veins are brought into communication with it by the development of transverse branches in front of the vertebral column (Figs. 479, 480) 33

    V. Angiology. 3. Development of the Vascular System 1918


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