opis·​thi·​on ə-ˈpis-thē-ˌän How to pronounce opisthion (audio)
plural opisthia -thē-ə How to pronounce opisthion (audio) or opisthions
: the median point of the posterior border of the foramen magnum

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Cite this Entry

“Opisthion.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/opisthion. Accessed 30 Nov. 2023.

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