Definition of "gyral" [gy•ral]

• Moving in a circle or spiral; gyratory. (adjective)
• Of or relating to a gyrus. (adjective)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "No seraphs bold, nor angels daring, ever penetrated the darkened highways or flashed on flaming pinions over the howling seas, gyral cataracts and leaping billows of that wide and black waste that divided the empire of sin from the empire of life."
• "Activation maps are shown on the average gyral structure (white lines) of the left and right hemispheres. z-score threshold = 4.0."
• "Sex-dependent effects of schizophrenia: an MRI study of gyral folding, and cortical and white matter"