Spontaneous
Encyclopedia
Spontaneous
- Spontaneous abortionMiscarriageMiscarriage or spontaneous abortion is the spontaneous end of a pregnancy at a stage where the embryo or fetus is incapable of surviving independently, generally defined in humans at prior to 20 weeks of gestation...
- Spontaneous bacterial peritonitisSpontaneous bacterial peritonitisSpontaneous bacterial peritonitis is the development of peritonitis despite the absence of an obvious source for the infection. It occurs almost exclusively in people with portal hypertension , usually as a result of cirrhosis of the liver...
- Spontaneous combustionSpontaneous combustionSpontaneous combustion is the self-ignition of a mass, for example, a pile of oily rags. Allegedly, humans can also ignite and burn without an obvious cause; this phenomenon is known as spontaneous human combustion....
- Spontaneous emissionSpontaneous emissionSpontaneous emission is the process by which a light source such as an atom, molecule, nanocrystal or nucleus in an excited state undergoes a transition to a state with a lower energy, e.g., the ground state and emits a photon...
- Spontaneous fissionSpontaneous fissionSpontaneous fission is a form of radioactive decay characteristic of very heavy isotopes. Because the nuclear binding energy reaches a maximum at a nuclear mass greater than about 60 atomic mass units , spontaneous breakdown into smaller nuclei and single particles becomes possible at heavier masses...
- Spontaneous generationSpontaneous generationSpontaneous generation or Equivocal generation is an obsolete principle regarding the origin of life from inanimate matter, which held that this process was a commonplace and everyday occurrence, as distinguished from univocal generation, or reproduction from parent...
- Spontaneous human combustionSpontaneous human combustionSpontaneous human combustion describes reported cases of the burning of a living human body without an apparent external source of ignition...
- Spontaneous Music EnsembleSpontaneous Music EnsembleThe Spontaneous Music Ensemble was a loose collection of free improvising musicians convened beginning in the mid-1960s by the late South London-based jazz drummer/trumpeter John Stevens and alto and soprano saxophonist Trevor Watts...
- Spontaneous orderSpontaneous orderSpontaneous order, also known as "self-organization", is the spontaneous emergence of order out of seeming chaos. It is a process found in physical, biological, and social networks, as well as economics, though the term "self-organization" is more often used for physical and biological processes,...
- Spontaneous processSpontaneous processA spontaneous process is the time-evolution of a system in which it releases free energy and moves to a lower, more thermodynamically stable energy state...
- Spontaneous remissionSpontaneous remissionSpontaneous healing, also called spontaneous remission or spontaneous regression, means an unexpected improvement or cure from a disease which usually is taking a different course. Both terms are mainly used for unexpected transient or final improvements in cancer. Spontaneous remissions concern...
- Spontaneous symmetry breakingSpontaneous symmetry breakingSpontaneous symmetry breaking is the process by which a system described in a theoretically symmetrical way ends up in an apparently asymmetric state....