perionyx
noun
peri·on·yx
ˌper-ē-ˈän-iks 
: the persistent layer of stratum corneum at the base of a fingernail or toenail
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“Perionyx.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/perionyx. Accessed 23 Dec. 2024.
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