"Biconvex" is a word in ENGLISH

Bent; crooked; curved laterally, esp. with the convex side outward; as, a bandy leg.

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

Specifically, having such a combination of concave and convex sides as makes the focal axis the shortest line between them. …

Convex on one side, and concave on the other. The curves of the convex and concave sides may be alike …

Convex on both sides; double convex. See under Convex, a.

Convex on one side, and flat on the other; plano-convex.

A curve traced by a point in the circumference of a circle which rolls on the convex side of a …

hayang v {1} [A; c1P] put s.t. convex down with the convex side down. Makahayang ka ba áring pawíkan? Could …

Bent out of a perpendicular position, or into a curve with the convex side uppermost.

A convex portion of a vessel's figure where a sudden change of shape occurs, as in a canal boat, where …

A lens convex on one side and concave on the other.

An edible fungus (Agaricus campestris), having a white stalk which bears a convex or oven flattish expanded portion called the …

An optical glass that is convex on both sides.

Plane or flat on one side, and convex on the other; as, a plano-convex lens. See Convex, and Lens.

A saber with a much curved blade having the edge on the convex side, -- in use among Mohammedans, esp., …