proatlas

noun

pro·​at·​las -ˈat-ləs How to pronounce proatlas (audio)
: a rudimentary vertebra that lies between the atlas and the occipital bone and that occurs as a regular feature of the structure of reptiles and may occur as an anomaly in humans

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“Proatlas.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/proatlas. Accessed 23 Nov. 2024.

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