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

A genus of ferns with twining or climbing fronds, bearing stalked and variously-lobed divisions in pairs.

A crystal having a similar tessellated appearance.

ision of birds including the swifts and humming birds. So called from the length of the distal part of the wing.

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.

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

sium 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 fern of the genus Adiantum (A. pedatum), having very slender graceful stalks. It is common in the United States, and is sometimes used in medicine. The name is also applied to other species of the same genus, as to the Venus-hair. Maiden grass, the smaller quaking grass. -- Maiden tree. See Ginkgo.…

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.

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 v…

A projection at the distal end of each bone of the leg at the ankle joint. The malleolus of the tibia is the internal projection, that of the fibula the external.

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.

ng to an acid first obtained from benzoic aldehyde (oil of better almonds), as a white crystalline substance; -- called also phenyl glycolic acid.

se; -- called also gray manganese ore. It occurs in brilliant steel-gray or iron-black crystals, also massive.