Definition of "nuchal" []

• The back of the neck (noun)
• Of or pertaining to the back or nape of the neck. (adjective)

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• ""Citation: 'Dietary sequestration of defensive steroids in nuchal glands of the Asian snake Rhabdophis tigrinus' by Deborah A. Hutchinson, Akira Mori, Alan H. Savitzky, Gordon M. Burghardt, Xiaogang Wu, Jerrold Meinwald, and Frank C. Schroeder.""
• "An ultrasound done between 10-13 weeks called the nuchal scan, combined with a blood test, is the earliest."
• "With the ultrasound they'll look at the amount of fluid in the baby's spinal column called the nuchal fold."