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 (zĭg′ə-pŏf′ĭ-sĭs, zī′gə-)
n. pl. zyg·a·poph·y·ses (-sēz′)
One of two usually paired processes of the neural arch of a vertebra that articulates with corresponding parts of adjacent vertebrae.

zyg′ap·o·phys′e·al, zyg′ap·o·phys′i·al (zĭg′ăp-ə-fĭz′ē-əl, zī′găp-) adj.
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.


(ˌzɪɡəˈpɒfɪsɪs; ˌzaɪɡə-)
n, pl -ses (-ˌsiːz)
1. (Anatomy) anatomy zoology one of several processes on a vertebra that articulates with the corresponding process on an adjacent vertebra
2. (Zoology) anatomy zoology one of several processes on a vertebra that articulates with the corresponding process on an adjacent vertebra
[C19: from zygo- + apophysis]
zygapophyseal, zygapophysial adj
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˌzɪg əˈpɒf ə sɪs, ˌzaɪ gə-)

n., pl. -ses (-ˌsiz)
one of the four processes of a vertebra, occurring in pairs that interlock each vertebra with the vertebrae above and below.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
References in periodicals archive ?
Exclusion criteria were patients with root compression or zygapophyseal arthrosis shown on plain X-ray and lumbar magnetic resonance imaging, vertebral fracture, previous thoracic spine surgery, signs or symptoms of thoracic canal stenosis, psychological disorder, localized or systemic infection, tumors, coagulopathy, pregnancy, osteoarthritis, and marked disc degeneration.
Fluoroscopic percutaneous lumbar zygapophyseal joint cyst rupture: a clinical outcome study.
A facet joint sprain and subsequent subluxation at the zygapophyseal joint was another suspicion.
Association of Rudimentary Sacral Zygapophyseal Facets and Accessory and Ligamentous Articulations: Implications for Load Transmission at the L5-S1 Junction.
It is stated that in the MMT, zygapophyseal joints guide the spine, and thus applying NAGs and SNAGs lead to an increase in ROM [26].
A recent study highlighted the effectiveness of radiofrequency neurotomy of the cervical dorsal rami in relieving pain in patients with chronic C3-4 and C6-7 zygapophyseal joint pain [6].
Occipital and suboccipital structures such as vessels, the dura mater of the posterior fossa, deep paraspinal neck muscle, and zygapophyseal joints are recognized as sources of head and neck pain [1, 9, 13].
Chiu, "Ultrasound-guided injection of lumbar zygapophyseal joints: an anatomic study with fluoroscopy validation," Regional Anesthesia and Pain Medicine, vol.
Changes in pressure pain thresholds over C5-C6 zygapophyseal joint after a cervicothoracic junction manipulation in healthy subjects.