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A plane of an orthorhombic crystal which is parallel both to the vertical axis and to the shorter lateral (brachydiagonal) axis.

A fish allied to the turbot (Rhombus levis), much esteemed in England for food; -- called also bret, pearl, prill. See Bret.

hence identical with rutile and octahedrite in composition, but crystallizing in the orthorhombic system.

Calcium carbonate, or carbonate of lime. It is rhombohedral in its crystallization, and thus distinguished from aragonite. It includes common limestone, chalk, and marble. Called also calc-spar and calcareous spar.

A mineral occuring in glassy rhombohedral crystals, varying, in color from white to yellow or red. It is essentially a hydrous silicate of alumina and lime. Called also chabasie.

teral cleavage, cleavage parallel to the lateral planes. -- Octahedral, Dodecahedral, or Rhombohedral, cleavage, cleavage parallel to the faces of an octahedron, dodecahedron, or rhombohedron. -- Prismatic cleavage, cleavage parallel to a vertical prism.

four equal straight lines, and having two of the interior angles acute and two obtuse; a rhombus; a lozenge.

Shaped like a diamond or rhombus.

An iron-black mineral of metallic luster, occurring in small orthorhombic crystals, also massive. It contains sulphur, arsenic, copper, and often silver.

A mineral of the pyroxene group, orthorhombic in crystallization; often fibrous and massive; color grayish white or greenish. It is a silicate of magnesia with some iron. Bronzite is a ferriferous variety.

his dress, his gait, his conversation. A cold-looking, formal garden, cut into angles and rhomboids. W. Irwing. She took off the formal cap that confined her hair. Hawthorne.

A bearing of a rhomboidal figure; -- named from its shape, which resembles that of a spindle.

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 vertebræ convex in front and concave behind, forming a ball and socket joint. See Ganoidel.…

A rhombohedral zeolitic mineral, related in form and composition to chabazite.

rted (into a specified substance or material); as, monoclinic sulphur goes over into orthorhombic, by standing; sucrose goes over into dextrose and levulose. -- To go through. (a) To accomplish; as, to go through a work. (b) To suffer; to endure to the end; as, to go through a surgical operation or a tedious illness.…

The shape of a half-moon; a crescent. See how in warlike muster they appear, In rhombs, and wedges, and half-moons, and wings. Milton.

Spiral. Helispherical line (Math.). the rhomb line in navigation. [R.]

the sesquioxide, so called because of the red color of the powder. It occurs in splendent rhombohedral crystals, and in massive and earthy forms; -- the last called red ocher. Called also specular iron, oligist iron, rhombohedral iron ore, and bloodstone. See Brown hematite, under Brown.

An orthorhombic mineral of the pyroxene group, of a grayish or greenish black color, often with a peculiar bronzelike luster (schiller) on the cleavage surface.

An ocher-yellow mineral occurring on minute rhombohedral crystals. It is a hydrous sulphate of iron and potash.