English definition of Concave

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Definition of concave

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Concave (a.) Hollow and curved or rounded; vaulted; -- said of the interior of a curved surface or line, as of the curve of the of the inner surface of an eggshell, in opposition to convex; as, a concave mirror; the concave arch of the sky..

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Ichthyornis :: Ichthyornis (n.) An extinct genus of toothed birds found in the American Cretaceous formation. It is remarkable for having biconcave vertebrae, and sharp, conical teeth set in sockets. Its wings were well developed. It is the type of the order Odontotormae..

Scotia :: Scotia (n.) A concave molding used especially in classical architecture.

Platycoelian :: Platycoelian (a.) Flat at the anterior and concave at the posterior end; -- said of the centra of the vertebrae of some extinct dinouaurs.

Teleosaur :: Teleosaur (n.) Any one of several species of fossil suarians belonging to Teleosaurus and allied genera. These reptiles are related to the crocodiles, but have biconcave vertebrae..

Roach-backed :: Roach-backed (a.) Having a back like that of roach; -- said of a horse whose back a convex instead of a concave curve.

Vaulty :: Vaulty (a.) Arched; concave.

Camera Obscura :: Camera obscura () An apparatus in which the images of external objects, formed by a convex lens or a concave mirror, are thrown on a paper or other white surface placed in the focus of the lens or mirror within a darkened chamber, or box, so that the outlines may be traced..

Concaveness :: Concaveness (n.) Hollowness; concavity.

Cup :: Cup (v. t.) To make concave or in the form of a cup; as, to cup the end of a screw..

Triquetrous :: Triquetrous (a.) Three sided, the sides being plane or concave; having three salient angles or edges; trigonal..

Dishing :: Dishing (a.) Dish-shaped; concave.

Dish :: Dish (n.) The state of being concave, or like a dish, or the degree of such concavity; as, the dish of a wheel..

Concave :: Concave (a.) Hollow and curved or rounded; vaulted; -- said of the interior of a curved surface or line, as of the curve of the of the inner surface of an eggshell, in opposition to convex; as, a concave mirror; the concave arch of the sky..

Concavo-concave :: Concavo-concave (a.) Concave or hollow on both sides; double concave.

Convexo-concave :: Convexo-concave (a.) Convex on one side, and concave on the other. The curves of the convex and concave sides may be alike or may be different. See Meniscus..

Concave :: Concave (n.) A curved sheath or breasting for a revolving cylinder or roll.

Concaved :: Concaved (imp. & p. p.) of Concav.

Basin :: Basin (n.) A hollow vessel, of various forms and materials, used in the arts or manufactures, as that used by glass grinders for forming concave glasses, by hatters for molding a hat into shape, etc..

Concavity :: Concavity (n.) A concave surface, or the space bounded by it; the state of being concave..

Cove :: Cove (n.) A concave molding.