Bible Dictionaries
Concavo-Convex

Webster's Dictionary

(1):

(a.) Specifically, having such a combination of concave and convex sides as makes the focal axis the shortest line between them. See Illust. under Lens.

(2):

(a.) Concave on one side and convex on the other, as an eggshell or a crescent.

Bibliography Information
Webster, Noah. Entry for 'Concavo-Convex'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​c/concavo-convex.html. 1828.