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Composed of convex convex concretions, somewhat resembling the breasts in form; studded with small mammiform protuberances.

high- speed engines. It consists of a light-tight box or camera having at one end a small convex mirror which reflects a beam of light on to the ground glass or photographic plate at the other end. The mirror is pivoted so that it can be moved in one direction by a small plunger operated by an elastic metal diaphragm w…

Concavo-convex, like a meniscus.

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

microscope. See under Oxyhydrogen, and Solar. -- Simple, or Single, microscope, a single convex lens used to magnify objects placed in its focus.

An edible fungus (Agaricus campestris), having a white stalk which bears a convex or oven flattish expanded portion called the pileus. This is whitish and silky or somewhat scaly above, and bears on the under side radiating gills which are at first flesh-colored, but gradually become brown. The plant grows in rich past…

Having a cylindrical body with a convex head of larger diameter; having a head like that of a mushroom.

A small convex molding surrounding a column at the jinction of the shaft and capital. Weale.

A molding, the section of which is the form of the letter S, with the convex part above; cyma reversa. See Illust. under Cyma.

An optical glass that is convex on both sides. [Obs.] Hutton.

An instrument devised by Helmholtz for measuring the size of a reflected image on the convex surface of the cornea and lens of the eye, by which their curvature can be ascertained.

ave behind; -- applied especially to vertebræ in which the anterior end of the centrum is convex and the posterior concave.

Convex; curved outward. "The convex or outbowed side of a vessel." Bp. Hall.

A round, convex molding. See Illust. of Column.

A genus of marine bivalves, in which one valve is flat, the other convex.

wing all around, or on all sides. Periscopic spectacles (Opt.), spectacles having concavo-convex or convexo-concave lenses with a considerable curvature corresponding to that of the eye, to increase the distinctness of objects viewed obliquely.

procoelian vertebræ, which have the anterior end of the centra concave and the posterior convex.

Curved convexly or swelled; as, a pulvinated frieze. Brande & C.

hannel, deeply recessed in proportion to its width, used to insulate and give relief to a convex rounded molding. Quirk molding, a bead between two quirks.

A small convex molding; a reed (see Illust. (i) of Molding); one of several set close together to decorate a surface; also, decoration by means of reedings; -- the reverse of fluting.