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supergravity
Science; General science
A theory that attempts to unify gravitation with the other fundamental interactions. The first, and only, completely successful unified theory was constructed by James Clerk ...
Hamilton-Jacobi theory
Science; General science
A theory that uses canonical transformations to construct a general procedure for solving mechanical problems. Either of two methods can be used.
zener diode
Science; General science
A two-terminal semiconductor junction device with a very sharp voltage breakdown as reverse bias is applied. The device is used to provide a voltage reference. It is named after ...
obsessive-compulsive disorder
Science; General science
A type of anxiety disorder (commonly referred to as OCD) characterized by recurrent, persistent, unwanted, and unpleasant thoughts (obsessions) or repetitive, purposeful ...
feline leukemia
Science; General science
A type of cancer caused by the feline leukemia virus, a retrovirus which affects only a small percentage of freely roaming or domestic cats. The feline leukemia virus is ...
cameo
Science; General science
A type of carved gemstone in which the background is cut away to leave the subject in relief. Often cameos are cut from stones in which the coloring is layered, resulting in a ...
nematicide
Science; General science
A type of chemical used to kill plant-parasitic nematodes. Nematicides may be classed as soil fumigants or soil amendments, space fumigants, surface sprays, or dips. Soil ...
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