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Procoelian :: Procoelian (a.) Concave in front; as, procoelian vertebrae, which have the anterior end of the centra concave and the posterior convex..

Thecodontia :: Thecodontia (n. pl.) A group of fossil saurians having biconcave vertebrae and the teeth implanted in sockets.

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

Concavous :: Concavous (a.) Concave.

Bruiser :: Bruiser (n.) A concave tool used in grinding lenses or the speculums of telescopes.

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..

Saddleback :: Saddleback (n.) Anything saddle-backed; esp., a hill or ridge having a concave outline at the top..

Hypocycloid :: Hypocycloid (n.) A curve traced by a point in the circumference of a circle which rolls on the concave side in the fixed circle. Cf. Epicycloid, and Trochoid..

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..

Opisthocoelous :: Opisthocoelous (a.) Concave behind; -- applied especially to vertebrae in which the anterior end of the centrum is convex and the posterior concave.

Depress :: Depress (a.) Having the middle lower than the border; concave.

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

Cope :: Cope (n.) Anything regarded as extended over the head, as the arch or concave of the sky, the roof of a house, the arch over a door..

Concaved :: Concaved (a.) Bowed in the form of an arch; -- called also arched.

Biconcave :: Biconcave (a.) Concave on both sides; as, biconcave vertebrae..

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..

Efflower :: Efflower (v. t.) To remove the epidermis of (a skin) with a concave knife, blunt in its middle part, -- as in making chamois leather..

Cavetto :: Cavetto (n.) A concave molding; -- used chiefly in classical architecture. See Illust. of Column.

Plano-concave :: Plano-concave (a.) Plane or flat on one side, and concave on the other; as, a plano-concave lens. See Lens..

Inshave :: Inshave (n.) A plane for shaving or dressing the concave or inside faces of barrel staves.

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