Medical Definition of gnathic index
: the anthropometric ratio of the distance from the nasion to the basion to that from the basion to the alveolar point multiplied by 100
— called also alveolar index
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“Gnathic index.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/gnathic%20index. Accessed 28 Jun. 2022.
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