Medical Definition of semilunar fold
: a small fold of membrane in the inner corner of the eye that is a vestige of a nictitating membrane
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Cite this Entry
“Semilunar fold.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/semilunar%20fold. Accessed 18 May. 2022.
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