vermilion border
noun
ver·mil·ion border
vər-ˈmil-yən- 
: the exposed pink or reddish margin of a lip
Cite this Entry
“Vermilion border.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/vermilion%20border. Accessed 21 May. 2025.
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