The definition of an epicanthus is a small fold of skin on the upper eye.(noun)
An example of an epicanthus is a fold above the eye that covers the inner eye of an individual with Down syndrome.
See epicanthus in Webster's New World College Dictionary
Origin: epi- + canthus
See epicanthus in American Heritage Dictionary 4
noun pl. ep·i·can·thi (-thī, -thē)
Origin: New Latin
Origin: : epi-
Origin: + canthus.