The end of life of an organism or cell. In humans and animals, death is manifested by the permanent cessation of vital organic functions, including the absence of heartbeat, spontaneous breathing, and brain activity. Cells die as a result of external injury or by an orderly, programmed series of self-destructive events known as apoptosis . The most common causes of death for humans in well-developed countries are cardiovascular disease, cancer, Alzheimer's disease, certain chronic diseases such as diabetes and emphysema, lung infections, and accidents.
Having a rotational or orbital movement that is opposite to the movement of most bodies within a celestial system. In the solar system, retrograde bodies are those that rotate or orbit in a clockwise direction (east to west) when viewed from a vantage point above the Earth's north pole. Venus, Uranus, and Pluto have retrograde rotational movements. No planets in the solar system have retrograde orbital movements, but four of Jupiter's moons exhibit such movement.
The average time needed for half the nuclei in a sample of a radioactive substance to undergo radioactive decay. The half-life of a substance does not equal half of its full duration of radioactivity. For example, if one starts with 100 grams of radium 229, whose half-life is 4 minutes, then after 4 minutes only 50 grams of radium will be left in the sample, after 8 minutes 25 grams will be left, after 12 minutes 12.5 grams will be left, and so on.
A series of unstable radioactive elements and isotopes, in which a given element or isotope beginning the series decays into and is succeeded by the next in the series, and so on until a stable nucleus is arrived at
fundamental force radioactive decay(related)
The spontaneous transformation of a relatively unstable particle into a set of new particles. For example, a pion decays spontaneously into a muon and an antineutrino. The decay of heavy or unstable atomic nuclei (such as uranium or carbon-10) into more stable nuclei and emitted particles is called radioactive decay . The study of particle decay is fundamental to subatomic physics.
The spontaneous transformation of an unstable atomic nucleus into a lighter one, in which radiation is released in the form of alpha particles, beta particles, gamma rays, and other particles. The rate of decay of radioactive substances such as carbon 14 or uranium is measured in terms of their half-life .
Any of various fungi or oomycete organisms that form a white or grayish coating on surfaces, such as plant leaves, cloth, or leather, especially under damp, warm conditions. Powdery mildews are important plant diseases usually caused by ascomycete fungi, while downy mildews, including a serious disease of grapevines, are caused by oomycetes.
suggests the breaking up or separation of something into its component elements a decomposing chemical compound: it is also a somewhat euphemistic substitute for
implies the breaking up of something into parts or fragments so that the wholeness of the original is destroyed the sunken ship gradually disintegrated
suggest a slow, progressive, crumbling decay old buildings molder away
is the common informal word for the decay of foods fish spoils quickly in summer
suggests the offensive, foul-smelling rotting of animal matter bodies putrefying in the fields
refers to the decay of organic, esp. vegetable, matter, caused by bacteria, fungi, etc. rotting apples
implies gradual, often natural, deterioration from a normal or sound condition his teeth have begun to decay
Find another word for decay. In this page you can discover 188 synonyms, antonyms, idiomatic expressions, and related words for decay, like: decomposition, decline, rot, rotting, broken-down, caducity, decrepit, caries, decadence, deterioration and disintegration.