ˈlimbəs noun
( -es )
Etymology: Medieval Latin, from Latin, border
1. : limbo
2.
[New Latin, from Latin, border]
: a border distinguished by color or structure: as
a. : a circumference or margin of a bivalve shell or of an insect wing external to the closed cells
b. : the marginal region of the cornea of the eye by which it is continuous with the sclera