Examples from the Web for concavo-convex
Other types employ two plano-convex lenses, the curved surfaces nearly in contact; or a concavo-convex and a plano-convex lens.
Winglets: small, concavo-convex scales, generally fringed at tip, under the base of the elytra in Dytiscidae.
Concavo-convex: hollowed out or concave on one surface, rounded or convex on the other; like a small segment of a hollow sphere.
Grain is oblong, obtusely trigonous, or concavo-convex, red-brown and rugulose on the ventral side.A Handbook of Some South Indian Grasses|Rai Bahadur K. Ranga Achariyar
When a concavo-convex plate is affixed to the outside of the cubit.An Introduction to Entomology: Vol. IV (of 4)|William Kirby