| banana republic |
(informal) a small, often politically unstable Central American country with a one-crop economy that is controlled by foreign capital (used as a derogatory label). |
| carbonic acid |
a weak colorless unstable acid, present only in solution, formed by dissolving carbon dioxide in water. |
| crisis |
an unstable or uncertain situation that has potential to bring about dramatic, possibly destructive, changes. [1/2 definitions] |
| cyanamide |
a caustic, white, unstable compound prepared by the reaction of calcium cyanamide with sulfuric acid and used in chemical production. |
| fulminate |
one of several unstable explosive compounds, esp. the mercury salt of fulminic acid, used as a detonating powder. [1/4 definitions] |
| fulminic acid |
an unstable acid, the salts of which are used in explosives. |
| hydrogen peroxide |
an unstable compound of hydrogen and oxygen whose water solution is used mostly as an antiseptic or bleach. |
| hyposulfurous acid |
an unstable acid found only in solution or in the form of its salts, used as a bleaching and reducing agent. |
| insecure |
not firmly established or built; unstable. [1/3 definitions] |
| instability |
the state or quality of being unsteady or unstable; lack of stability. |
| instable |
unstable. |
| labile |
unstable, as chemical elements or compounds. [1/2 definitions] |
| lose one's balance |
to become unstable or fall. |
| muon |
an unstable subatomic particle with a positive or negative charge, having 207 times the mass of an electron. |
| nitrous acid |
an unstable, inorganic nitrogen compound that occurs only in solution or in its salts as nitrites. |
| perchloric acid |
a strong acid of hydrogen, chlorine, and oxygen that is unstable in some conditions, is a powerful oxidizing agent, and is used as a catalyst and in explosives. |
| permanganic acid |
an unstable acid that is a strong oxidizing agent in aqueous solutions. |
| precarious |
so unstable or insecure as to be dangerous; risky. [1/3 definitions] |
| psi particle |
an unstable meson that is thought to be composed of a quark and its antiparticle. |
| radioactive |
emitting energy or subatomic particles as a result of the decay of unstable isotopes. [2 definitions] |
| radioactivity |
the emission or amount of emission of energy or subatomic particles by the nuclei of certain unstable isotopes of elements as they decay. |