without definite shape or structural differentiation; pertains to solids without crystalline structure

like glass, randomly composed material, non-crystalline. Includes agate, obsidian, turquoise.

(4) substances lacking detectable crystal structure or order. Usually used with reference to oxides or organic matter. See also mineral.

Without regard for definite form; uncrystallized, structureless.

Non-crystalline; lacking a crystal structure; a solid such as glass, opal, wood, coal, that lacks an ordered atomic arrangement.

Devoid of crystallinity. Most plastics are in the amorphous state at processing temperatures; many retain this state under normal conditions.

Non crystalline, having no determinable form or crystalline form. Solids to be removed by filtration may be amorphous.

Amorphous substances have no definite repeating pattern in their atomic structures. There may be small regions of order, but, overall there is considerable disorder. Most substances we contact on a day to day basis are amorphous.

(a-mor'-phous) The state of a solid lacking a crystal structure, specifically lacking long-range order. andesite (an-de-site) A dark-colored to light gray, fine-grained extrusive igneous rock that typically formed through the relatively rapid crystallization of a lava. Andesites can also form through the accumulation of pyroclastic material explosively erupted from a volcano. Andesites are typically porphyritic or composed of two sizes of crystalline material. The larger crystals or phenocrysts are composed primarily of zoned sodic plagioclase (especially andesine) and one or more of the following mafic minerals, biotite, hornblende, pyroxene, and are surrounded by a groundmass consisting of finer-grained minerals of the same composition as the phenocrysts but too small to be seen without a microscope. Andesites contain more silica, aluminum, sodium, and potassium and less magnesium, iron, and calcium than basalts. If an andesitic magmas undergoes magmatic differentiation typically there will be an increase in Si, Al, Na, and K, and a decrease in Mg, Fe, and Ca, dacite and ultimately rhyolite lavas could be produced. Andesite was named after the Andes Mountains of South America.

without an ordered structure; not crystalline.

An atomic structure having no definite or recognizable form.

Literally, without form or shape. Used to describe substances that are solids but not crystals.

a substance with considerable disorder in its structure

Without structure. Amorphous plastics do not form the uniform, compact, ordered chains of crystalline plastics.

state characterised by the absence of order in material particle distribution, as opposed to a crystalline state

Without a regular structure. Amorphous minerals do not have a repeating crystalline matrix. Glass, for example, is amorphous because it is cooled in the kiln quickly enough that no crystals have an opportunity to form.

Having no definite order of crystalline structure. Refers to magnetic materials that are metallurgically non-crystalline in nature.

Non-crystalline, without definite structural parts.

having no definite form or distinct shape; "amorphous clouds of insects"; "an aggregate of formless particles"; "a shapeless mass of protoplasm"

lacking the system or structure characteristic of living bodies

without real or apparent crystalline form; "an amorphous mineral"; "amorphous structure"

A noncrystalline substance, atoms lack long range order.

A wound with no definitive form

without (regular) form, glassy, noncrystalline, a condition of great disorder or absence of structure

Term applied to gem materials that have no orderly crystal structure; opal is an example.

Having a noncrystalline structure.

Having no determinate form, irregular; shapeless and non crystalline..

is the term applied to rock and minerals having no definite crystalline structure.

Means "without form"; applied to rocks and minerals that lack definite crystal structures.

A glass, not having a crystalline structure.

Having no definite form or shape. Spirits often appear in mist-like forms.

Materials which are devoid of long-range periodic structure.

A metal lacking distinct crystalline structure with random arrangement of atoms or molecules.

Mineral-like material which is noncrystalline (e.g. Amber)

A property meaning that something does not have a regular structure. Glass ( www.glass-fabricators.com) is an example of an amorphous material, as a result of its being cooled too rapidly to form a crystalline structure.

having no ordered arrangement. Polymers are amorphous when their chains are tangled up in any old way. Polymers are not amorphous when their chains are lined up in ordered crystals. (see: crystal)

Having no apparent shape or order; noncrystalline.

Not having any definite form.

A condition where atoms and molecules of a material are not arranged in definite pattern or form (that is, the material is not crystalline). A characteristic of amorphous materials is lack of certain well-defined physical properties such as distinct melting point or boiling point. Generally, amorphous materials are poor conductors of heat and electricity. Glass, carbon and rosin are examples of amorphous materials.

1-No definite form or shape; not crystallized.2-Early type of LCD panel technology before polysilicon.

Formless, without easily-defined shape.

Polymers that have no order to their molecules, thus no crystalline component.

having an atomic structure that is not periodic.

Having an uncrystallized structure like glass. MetaMax® and other pozzolanic materials have a glass-like, amorphous structure.

a low-temperature state of ice in which the molecules are held together by hydrogen (H) bonds and do not have enough energy to assume a crystalline form; a non-crystalline solid phase.

An uncrystallized substance. From the Latin adamas, meaning invincible, is derived the term "adamantine" used to describe the brilliance, purity and hardness of a diamond. The diamond in the photo is of a pear-drop shape.

amorphous solid. Compare with crystal. A solid that does not have a repeating, regular three-dimensional arrangement of atoms, molecules, or ions.

A term applied to rocks or minerals that possess no definite crystal structure or form, such as amorphous carbon.

adj. Without determinate shape.

noncrystalline, or devoid of regular structure.

The condition of a solid in which the atoms are not arranged in an orderly pattern.

non-crystalline polymer or non-crystalline areas in a polymer.

Greek "formless" Such matter, whose corpuscles don't show regular arrangement in spite of their solid state.

not having a crystalline structure, i.e. having an unordered arrangement of molecules.

Shapeless. Not consisting of crystals. Non crystalline. Glass is amorphous. Sugar is crystalline.

Solid materials crystallized with no specific atomic arrangements. This occurs when this layers are formed in a vacuum from vaporized materials as well as when materials are rapidly cooled down from melting state.

Amorphous means without form. An amorphous gem, like jet, amber, or ivory, does not have a regular internal structure, like those gems that fall within the seven crystal systems.

having no definite shape or boundaries; a term applied to rocks and minerals that have no definite crystalline structure.

Latin meaning without form. Non-crystalline structure.

Not composed of crystals in a physical structure

Amorphous is an adjective meaning shapeless or lacking crystal structure (such as Amber).

Without a regular internal atomic structure or external shape.

An amorphous material is non-crystalline. Within the starch granule there are both amorphous and crystalline regions. The amorphous areas are characterised by a higher degree of molecular disorder with the chains having a random conformation. In the crystalline zones the linear sections of molecules, both of amylose and amylopectin, are arranged in parallel crystalline bundles.

Amorphous means without form and refers to gems such as amber, ivory or jet which don't have a formal internal structure. Opposite of crystalline gems.

Having an irregular structure. Amorphous crystal structures are more useful in optical assemblies since they are not as prone to fracture along a crystal boundary. Crystals can sometimes be converted from mono-crystalline to poly-crystalline to amorphous by proper annealing.

a random arrangement of polymers.

Without defined form. Shapeless.

A gem lacking a distinct crystalline structure such as amber, ivory, and jet.

a material state where the atoms making up the material are randomly oriented relative to each other. See also crystalline, polycrystalline.