Also found in: Medical, Wikipedia.


1. Moving in a circle or spiral; gyratory.
2. Of or relating to a gyrus.

gy′ral·ly adv.
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.


1. (General Physics) having a circular, spiral, or rotating motion; gyratory
2. (Anatomy) anatomy of or relating to a convolution (gyrus) of the brain
ˈgyrally adv
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˈdʒaɪ rəl)

1. moving in a circle or spiral; gyrating.
2. of or pertaining to a gyrus.
gy′ral•ly, adv.
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.gyral - relating to or associated with or comprising a convolution of the brain; "the gyral sulcus"
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
Non-enhanced computed tomography (CT) scans, performed subsequently, confirmed the presence of intracortical calcification (Figure 2D), revealing a (gyral) "tramtrack" pattern, obscured by blooming susceptibility effect on SWI scans (Figure 2C).
(2017), who reported that most of cerebral tuberculomas size ranging from 2 to 22.2 cm3.8 However, cerebral tuberculomas can present as solitary large lesion with gyral enhancement similar to tumors as reported by Gameraddin M et al.
The brain weighed 150g after fixation, far below that expected (362g) for gestational age, and was grossly small and had a simplified gyral pattern.
The loss of ASPM leads to a premature switch from symmetric to asymmetric cell division, decreasing the number of postmitotic neurons in the developing cortex, reflected in a reduced cortical surface area and a simplified gyral pattern.
Variations of the age at which the peak weight of an organ is reached has been noted between populations, with gyral atrophy occurring at 60-years of age (Andersen et al., 2003).
Experimental lesions made in the gyral division of the anterior cingulate cortex (ACCg) affect normal patterns of social interest in other male or female macaques.
([dagger]) Brain abnormalities or microcephaly (congenital microcephaly [head circumference <3rd percentile for gestational age and sex], intracranial calcifications, cerebral atrophy, abnormal cortical gyral patterns [e.g., polymicrogyria, lissencephaly, pachygyria, schizencephaly, gray matter heterotopia], corpus callosum abnormalities, cerebellar abnormalities, porencephaly, hydranencephaly, ventriculomegaly/hydrocephaly [excluding "mild" ventriculomegaly without other brain abnormalities], fetal brain disruption sequence [collapsed skull, overlapping sutures, prominent occipital bone, scalp rugae], other major brain abnormalities).
Other patterns described include gyral distribution, T2 prolongation, and restricted diffusion involving the area of seizure origin or propagation (Figures 4 and 5).
CSF compartment has big influence on both signal topography and magnitude, resulting in strong signal attenuation for superficial sources on gyral crowns [52].
Fischl et al., "An automated labeling system for subdividing the human cerebral cortex on MRI scans into gyral based regions of interest," NeuroImage, vol.
On the basis of MR scans, more or less symmetrical hyperintense cortical and subcortical white matter lesions occur on T2-weighted images with gyral and/or leptomeningeal contrast enhancement.
(19,59) Ultrasound and/or autopsy may reveal widespread brain calcifications (periventricular, cerebral parenchyma, thalami, and basal ganglia), cortical thinning with ventricular dilation, simplified gyral patterns (eg, lissencephaly, pachygyria, agyria), and cerebellar hypoplasia.