Definition of crystal

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Crystal (n.) The regular form which a substance tends to assume in solidifying, through the inherent power of cohesive attraction. It is bounded by plane surfaces, symmetrically arranged, and each species of crystal has fixed axial ratios. See Crystallization..

Lern More About Crystal

Travertine :: Travertine (n.) A white concretionary form of calcium carbonate, usually hard and semicrystalline. It is deposited from the water of springs or streams holding lime in solution. Extensive deposits exist at Tivoli, near Rome..
Hyoscyamine :: Hyoscyamine (n.) An alkaloid found in henbane (Hyoscyamus niger), and regarded as its active principle. It is also found with other alkaloids in the thorn apple and deadly nightshade. It is extracted as a white crystalline substance, with a sharp, offensive taste. Hyoscyamine is isomeric with atropine, is very poisonous, and is used as a medicine for neuralgia, like belladonna. Called also hyoscyamia, duboisine, etc..
Pleochroism :: Pleochroism (n.) The property possessed by some crystals, of showing different colors when viewed in the direction of different axes..
Dendritical :: Dendritical (a.) Pertaining to a dendrite, or to arborescent crystallization; having a form resembling a shrub or tree; arborescent..
Curarine :: Curarine (n.) A deadly alkaloid extracted from the curare poison and from the Strychnos toxifera. It is obtained in crystalline colorless salts.
Microlite :: Microlite (n.) A minute inclosed crystal, often observed when minerals or rocks are examined in thin sections under the microscope..
Cerotin :: Cerotin (n.) A white crystalline substance, C27H55.OH, obtained from Chinese wax, and regarded as an alcohol of the marsh gas series; -- called also cerotic alcohol, ceryl alcohol..
Needle :: Needle (v. i.) To form needles; to crystallize in the form of needles.
Pectolite :: Pectolite (n.) A whitish mineral occurring in radiated or fibrous crystalline masses. It is a hydrous silicate of lime and soda.
Ruberythrinic :: Ruberythrinic (a.) Pertaining to, or designating, an acid extracted from madder root. It is a yellow crystalline substance from which alizarin is obtained..
Isorcin :: Isorcin (n.) A crystalline hydrocarbon derivative, metameric with orcin, but produced artificially; -- called also cresorcin..
Dendrite :: Dendrite (n.) A stone or mineral on or in which are branching figures resembling shrubs or trees, produced by a foreign mineral, usually an oxide of manganese, as in the moss agate; also, a crystallized mineral having an arborescent form, e. g., gold or silver; an arborization..
Melilite :: Melilite (n.) A mineral occurring in small yellow crystals, found in the lavas (melilite basalt) of Vesuvius, and elsewhere..
Orpiment :: Orpiment (n.) Arsenic sesquisulphide, produced artificially as an amorphous lemonyellow powder, and occurring naturally as a yellow crystalline mineral; -- formerly called auripigment. It is used in king's yellow, in white Indian fire, and in certain technical processes, as indigo printing..
Creatinin :: Creatinin (n.) A white, crystalline, nitrogenous body closely related to creatin but more basic in its properties, formed from the latter by the action of acids, and occurring naturally in muscle tissue and in urine..
Rhaphides :: Rhaphides (n. pl.) Minute transparent, often needle-shaped, crystals found in the tissues of plants..
Datolite :: Datolite (n.) A borosilicate of lime commonly occuring in glassy,, greenish crystals..
Silicon :: Silicon (n.) A nonmetalic element analogous to carbon. It always occurs combined in nature, and is artificially obtained in the free state, usually as a dark brown amorphous powder, or as a dark crystalline substance with a meetallic luster. Its oxide is silica, or common quartz, and in this form, or as silicates, it is, next to oxygen, the most abundant element of the earth's crust. Silicon is characteristically the element of the mineral kingdom, as carbon is of the organic world. Symbol Si. A
Cascarillin :: Cascarillin (n.) A white, crystallizable, bitter substance extracted from oil of cascarilla..
Granite :: Granite (n.) A crystalline, granular rock, consisting of quartz, feldspar, and mica, and usually of a whitish, grayish, or flesh-red color. It differs from gneiss in not having the mica in planes, and therefore in being destitute of a schistose structure..
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