unstable

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unstable

(ŭn-stā′bəl)
adj. unsta·bler, unsta·blest
1. Chemistry
a. Decomposing readily.
b. Highly or violently reactive.
2. Physics
a. Decaying with relatively short lifetime. Used of subatomic particles.
b. Radioactive.

un·sta′ble·ness n.
un·sta′bly adv.

unstable

[unstā′bəl]
1 in an excited or active state, such as an atom with a nucleus possessing excess energy.
2 easily broken down or prone to decomposition.

unstable

adjective Referring to the structural or physical lability or instability of a chemical or other substance during production, transportation, or storage. See Unstable reactive substance.

unstable,

adj 1. not firm or fixed in one place; likely to move.
2. capable of undergoing spontaneous change. A nuclide in an unstable state is called
radioactive. An atom in an unstable state is called
excited.
unstable angina
n a form of pain that is prodromal to acute myocardial infarction. It typically has a sudden onset, sudden worsening, and stuttering recurrence over days and weeks. It carries a more severe short-term prognosis than stable chronic angina. Nearly one third of unstable angina patients experience myocardial infarction within 3 months of the first episode.

unstable

having a tendency to disrupt, e.g. unstable chemicals.

unstable fracture
the principal fragments in a reduced fracture are overriding. Slow union or nonunion results.
References in periodicals archive ?
The answer to this problem combines the deficiency of inflectional endings, unstableness of the ga-/ge- prefix and a productive prefix system in Old English and German.
Awareness of potential limits to these approaches should not, however, end in silence or inaction, but should help in developing frameworks that recognize the complexity and unstableness of positional categories (Shahrzad Mojab, 1998; Hideh Moghissi, 1999; Chandra T.
So some people, mainly those who could not bear the unstableness, the uncertainty of postmodernism anymore, made an attempt again to insist on the old-fashioned justice opposing to America's imperialism.
a great unstableness in emancipating children while the parents