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carbonate, a rose-red mineral sometimes occuring crystallized, but generally massive with rhombohedral cleavage like calcite; -- called also dialogite.

A pyramidal form under the rhombohedral system, inclosed by twelve faces, each a scalene triangle.

A leek-green or brownish mineral occurring in orthorhombic crystals. It is a hydrous arseniate of iron. [Written also skorodite.]

ate of iron, an important ore of iron occuring generally in cleavable masses, but also in rhombohedral crystals. It is of a light yellowish brown color. Called also sparry iron, spathic iron.

, which are large and broad and united to the sides of the body and head, give a somewhat rhombic form to these fishes. The skin is more or less spinose.

(Serranus fascicularis) of the Southern United States. (b) The sailor's choice (Diplodus rhomboides). (c) The redmouth, or grunt. (d) A market fish of Bermuda (Holocentrum Ascensione). -- Squirrel grass (Bot.), a pestiferous grass (Hordeum murinum) related to barley. In California the stiffly awned spiklets work into…

A plane figure having four sides and angles; a quadrangle, as a square, a rhombus, etc.

ning to a tetragon; having four angles or sides; thus, the square, the parallelogram, the rhombus, and the trapezium are tetragonal fingers.

A mineral occurring in rhombic prisms, generally yellowish and pellucid, also colorless, and of greenesh, bluish, or brownish shades. It sometimes occurs massive and opaque. It is a fluosilicate of alumina, and is used as a gem.

A mineral occurring usually in three-sided or six-sided prisms terminated by rhombohedral or scalenohedral planes. Black tourmaline (schorl) is the most common variety, but there are also other varieties, as the blue (indicolite), red (rubellite), also green, brown, and white. The red and green varieties when transpare…

Same as Orthorhombic.

A large European flounder (Rhombus maximus) highly esteemed as a food fish. It often weighs from thirty to forty pounds. Its color on the upper side is brownish with small roundish tubercles scattered over the surface. The lower, or blind, side is white. Called also bannock fluke.

f a wedge, as a body of troops drawn up in such a form. In warlike muster they appear, In rhombs, and wedges, and half-moons, and wings. Milton.

The sailor's choice (Diplodus rhomboides).

A grayish or whitish mineral occurring in orthorhombic, prismatic crystals, also in columnar masses. It is a silicate of alumina and lime, and is allied to epidote.