In a manner relating to brain gyri or in a circular, ridge-like way.
Formed from 'gyral' (relating to gyri) plus the adverb suffix '-ly'. This is a technical anatomical adverb rarely used outside specialized medical contexts.
This word is so specialized that most doctors would understand it better by just saying 'the brain surface' instead—it's one of those words that exists mainly in medical textbooks and research papers.
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