concavo-convex

[ kon-key-voh-kon-veks ]

/ kɒnˈkeɪ voʊ kɒnˈvɛks /

Also convexo-concave. concave on one side and convex on the other.

Optics. pertaining to or noting a lens in which the concave face has a greater degree of curvature than the convex face.

Origin of concavo-convex

1670–80; < Latin concav(us) + -o- + convex

Other types employ two plano-convex lenses, the curved surfaces nearly in contact; or a concavo-convex and a plano-convex lens.

Encyclopaedia Britannica, 11th Edition, Volume 16, Slice 2 |Various
Winglets: small, concavo-convex scales, generally fringed at tip, under the base of the elytra in Dytiscidae.

Explanation of Terms Used in Entomology |John. B. Smith
Concavo-convex: hollowed out or concave on one surface, rounded or convex on the other; like a small segment of a hollow sphere.

Explanation of Terms Used in Entomology |John. B. Smith
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

concavo-convex

having one side concave and the other side convex

(of a lens) having a concave face with greater curvature than the convex face Compare convexo-concave (def. 2)

concavo-convex

[ kŏn-kā′vō-kŏn-vĕks′ ]

Of or being concave on one surface and convex on the opposite surface.