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

Bowl :: Bowl (n.) A concave vessel of various forms (often approximately hemispherical), to hold liquids, etc..

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

Concave :: Concave (a.) Hollow; void of contents.

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

Saddle-backed :: Saddle-backed (a.) Having the outline of the upper part concave like the seat of a saddle.

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

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

Ginglymodi :: Ginglymodi (n.) An order of ganoid fishes, including the modern gar pikes and many allied fossil forms. They have rhombic, ganoid scales, a heterocercal tail, paired fins without an axis, fulcra on the fins, and a bony skeleton, with the vertebrae convex in front and concave behind, forming a ball and socket joint. See Ganoidel..

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..

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

Plano- :: Plano- (a.) Combining forms signifying flat, level, plane; as planifolious, planimetry, plano-concave..

Castanets :: Castanets (n. pl.) Two small, concave shells of ivory or hard wood, shaped like spoons, fastened to the thumb, and beaten together with the middle finger; -- used by the Spaniards and Moors as an accompaniment to their dance and guitars..

Hypotrochoid :: Hypotrochoid (n.) A curve, traced by a point in the radius, or radius produced, of a circle which rolls upon the concave side of a fixed circle. See Hypocycloid, Epicycloid, and Trochoid..

Amphicoelous :: Amphicoelous (a.) Having both ends concave; biconcave; -- said of vertebrae.

Tocororo :: Tocororo (n.) A cuban trogon (Priotelus temnurus) having a serrated bill and a tail concave at the end.

Concavation :: Concavation (n.) The act of making 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..

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

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..

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