Search the Dictionary

A mineral occurring in small, green, transparent, monoclinic crystals. It is a hydrous phosphate of iron.

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

side found in the seeds of several species of lupine, and extracted as a yellowish white crystalline substance.

in several species of lupine (Lupinus luteus, L. albus, etc.), and extracted as a bitter crystalline substance.

a yellow color. Cf. Cobaltic. Luteocobaltic chloride (Chem.), a brilliant reddish yellow crystalline compound, Co2Cl6(NH3)12, obtained by the action of ammonium chloride on an ammoniacal solution of cobaltic chloride.

ullian, Cornwall, characterized by the presence of radiating groups of minute tourmaline crystals.

A crystal having a similar tessellated appearance.

The longer of two diagonals, as of a rhombic prism. See Crystallization.

A dome parallel to the longer lateral axis of an orthorhombic crystal. See Dome, n., 4.

One of the two planes of an orthorhombic crystal which are parallel to the vertical and longer lateral (macrodiagonal) axes.

A prism of an orthorhombic crystal between the macropinacoid and the unit prism; the corresponding pyramids are called macropyramids.

A marine food fish (Sciæna chrysura), of the Southern United States; -- called also yellowtail, and silver perch.

The amorphous or homogenous matrix or ground mass, as distinguished from well-defined crystals; as, the magma of porphyry.

nesium carbonate occurring in white compact or granular masses, and also in rhombohedral crystals.

An oxide of iron (Fe3O4) occurring in isometric crystals, also massive, of a black color and metallic luster. It is readily attracted by a magnet and sometimes possesses polarity, being then called loadstone. It is an important iron ore. Called also magnetic iron.

A white crystalline substance forming the ethyl salt of malamic acid.

The acid amide derived from malic acid, as a white crystalline substance metameric with asparagine.

s; as, malic acid. Malic acid, a hydroxy acid obtained as a substance which is sirupy or crystallized with difficulty, and has a strong but pleasant sour taste. It occurs in many fruits, as in green apples, currants, etc. It is levorotatory or dextrorotatory according to the temperature and concentration. An artificial…

Pertaining to, or designating, an acid produced artifically as a white crystalline substance, CH2.(CO2H)2, and so called because obtained by the oxidation of malic acid.

A crystalline sugar formed from starch by the action of distance of malt, and the amylolytic ferment of saliva and pancreatic juice. It resembles dextrose, but rotates the plane of polarized light further to the right and possesses a lower cupric oxide reducing power.