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Cove :: Cove (n.) A member, whose section is a concave curve, used especially with regard to an inner roof or ceiling, as around a skylight..

Lieberkuhn :: Lieberkuhn (n.) A concave metallic mirror attached to the object-glass end of a microscope, to throw down light on opaque objects; a reflector..

Concavo-convex :: Concavo-convex (a.) Concave on one side and convex on the other, as an eggshell or a crescent..

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

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..

Convex :: Convex (a.) Rising or swelling into a spherical or rounded form; regularly protuberant or bulging; -- said of a spherical surface or curved line when viewed from without, in opposition to concave..

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

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..

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

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

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..

Cove :: Cove (v. t.) To arch over; to build in a hollow concave form; to make in the form of a cove.

Rhynchocephala :: Rhynchocephala (n. pl.) An order of reptiles having biconcave vertebrae, immovable quadrate bones, and many other peculiar osteological characters. Hatteria is the only living genus, but numerous fossil genera are known, some of which are among the earliest of reptiles. See Hatteria. Called also Rhynchocephalia..

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

Lunette :: Lunette (n.) A kind of watch crystal which is more than ordinarily flattened in the center; also, a species of convexoconcave lens for spectacles..

Gullet :: Gullet (n.) A concave cut made in the teeth of some saw blades.

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..

Fillet :: Fillet (n.) A concave filling in of a reentrant angle where two surfaces meet, forming a rounded corner..

Trochilus :: Trochilus (n.) An annular molding whose section is concave, like the edge of a pulley; -- called also scotia..

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..

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