unstable

Mineral with a crystal structure that is unable to exist at the current temperature. When certain minerals become unstable, they transform into their paramorphs. Also refers to radioactive minerals which cannot withstand their composition and begin to decay.
Found on http://www.encyclo.co.uk/local/22291

Unstable

• (a.) Not stable; not firm, fixed, or constant; subject to change or overthrow.
Found on http://thinkexist.com/dictionary/meaning/unstable/

unstable

adjective highly or violently reactive; `sensitive and highly unstable compounds`
Found on https://www.encyclo.co.uk/local/20974

Unstable

[Debian] In the Debian jargon, unstable is the development distribution of Debian. It is codenamed sid (after the boy next door who broke toys in Toy Story). As unstable never becomes testing, this codename is permanent, contrary to the codenames of stable and testing, which have volatile codenames. unstable has some newer packages, but suf...
Found on http://en.wikipedia.org/wiki/Unstable_(Debian)

Unstable

Having a basin of attraction that is 0 in size; being such that the slightest perturbation will forever change the state of a system. A pencil balanced on its point is unstable.
Found on http://www.encyclo.co.uk/local/20090

unstable

highly or violently reactive
Found on https://www.vocabulary.com/lists/158781

Unstable

Matter that is capable of undergoing spontaneous change, as in a radioactive nuclide or an excited nuclear system. An unstable particle is any elementary particle that spontaneously decays into other particles.
Found on http://www2.slac.stanford.edu/vvc/glossary.html

Unstable

Occurs when a rising air parcel becomes less dense than the surrounding air. Since its temperature w
Found on http://www.superglossary.com/Glossary/Science/Weather/

unstable

The opposite of stable, i.e. the chemical species concerned has a higher molar Gibbs energy than some assumed standard. The term should not be used in place of reactive or transient, although more reactive or transient species are frequently also more unstable. (Very unstable chemical species tend to undergo exothermic unimolecular decompositions. ...
Found on http://www.chem.qmul.ac.uk/iupac/gtpoc/TtZ.html

unstable

[adj] - lacking stability or fixity or firmness 2. [adj] - disposed to psychological variability 3. [adj] - highly or violently reactive
Found on http://www.webdictionary.co.uk/definition.php?query=unstable
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