Meaning & use
Gnathion
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In anatomy, the lowest point on the midline of the lower border of the jawbone (mandible), used as a reference point in craniofacial measurement.
See it in a sentence
The anthropologist measured the distance from the nasion to the gnathion to estimate facial proportions.
Orthodontic X-rays often mark the gnathion to track jaw growth over time.
A note on using this word
"Gnathion" derives from the Greek "gnathos," meaning "jaw," and is used almost exclusively in anatomical and forensic contexts.
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