CONCAVO-CONVEX • FREE-TRANSLATOR.COM • Definition of Concavo-convex

... Concavo-convex: hollowed out or concave on one surface, rounded or convex on the other; like a small segment of ...

— Explanation of Terms Used in Entomology • John. B. Smith

... several punctures. None had escaped. How the human body survives a storm like this must be explained by the fact that it is exposed to it but a few moments at a time, whereas these grand old trees had had no one to take their places, from the rising to the going down of the sun. Angular bits of iron, concavo-convex, sticking in the sides of muddy depressions, showed where shells had exploded in their furrows. Knapsacks, canteens, haversacks distended with soaken and swollen biscuits, gaping to disgorge, blankets beaten into the soil ...

— The Collected Works of Ambrose Bierce • Ambrose Bierce