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fission
2 ENTRIES FOUND:
Learner's definition of FISSION
[noncount]
1
physics : a process in which the nucleus of a heavy atom is split apart（原子核的）分裂，裂变
◊ A large amount of energy is released when fission occurs.核裂变发生时，释放出巨大的能量。
— called also nuclear fission
— compare fusion 2
biology : a kind of reproduction in which a cell or body divides into two or more parts and each part grows into a whole new individual细胞分裂；裂体生殖
fissioned; fissioning; fissions
: to undergo fission
: to cause to undergo fission
Example Sentences
Recent Examples on the Web
Caroline Delbert, Popular Mechanics, 13 Sep. 2022 There is, in fact, no energy phenomenon that comes close to matching what nuclear fission offers, something that was obvious to its proponents from the earliest days and was the central animating reason for excitement. Nr Editors, National Review, 11 Aug. 2022 All told, 80 percent of domestic electricity production comes from natural gas, coal and nuclear fission. Clive Thompson, Smithsonian Magazine, 5 July 2022 For artists, that fission can be transformational, if not electrifying. Amanda Petrusich, The New Yorker, 5 July 2022 For example, the cost of generating electricity from oil, gas, wind, solar or nuclear fission all have different values. Alexander Lidow, Forbes, 30 June 2022 Relatively small and lightweight, fission systems can enable continuous power—regardless of location, weather, sunlight, or other natural resources. Stephanie Mlot, PCMAG, 23 June 2022 Inside the core, uranium atoms split in a process called fission, which releases heat. Manasee Wagh, Popular Mechanics, 11 May 2022 The agency's fission surface power initiative expands on five decades of heritage projects, including Kilopower, which ended in 2018. Stephanie Mlot, PCMAG, 23 June 2022 Washington Post, 28 Apr. 2022 The point is that by analyzing the array of radioactive fission products – those that can be captured and analyzed – nuclear forensic specialists can start to figure out if the atoms that fissioned were U-235, Pu-239, or (in some cases) U-238. Andrew Karam, Popular Mechanics, 7 Jan. 2016 Anyone can see that fissioning uranium 235 or plutonium can be used to generate electricity. Scientific American, 1 Jan. 2018 See More
Noun
The nuclear plants in play today use fission technology, meaning the use of heavier elements whose nucleuses are forcibly split in order to release heat energy. Caroline Delbert, Popular Mechanics, 13 Sep. 2022 There is, in fact, no energy phenomenon that comes close to matching what nuclear fission offers, something that was obvious to its proponents from the earliest days and was the central animating reason for excitement. Nr Editors, National Review, 11 Aug. 2022 All told, 80 percent of domestic electricity production comes from natural gas, coal and nuclear fission. Clive Thompson, Smithsonian Magazine, 5 July 2022 For artists, that fission can be transformational, if not electrifying. Amanda Petrusich, The New Yorker, 5 July 2022 For example, the cost of generating electricity from oil, gas, wind, solar or nuclear fission all have different values. Alexander Lidow, Forbes, 30 June 2022 Relatively small and lightweight, fission systems can enable continuous power—regardless of location, weather, sunlight, or other natural resources. Stephanie Mlot, PCMAG, 23 June 2022 Inside the core, uranium atoms split in a process called fission, which releases heat. Manasee Wagh, Popular Mechanics, 11 May 2022 The agency's fission surface power initiative expands on five decades of heritage projects, including Kilopower, which ended in 2018. Stephanie Mlot, PCMAG, 23 June 2022 Verb
Most atoms do not fission, but the isotopes of certain elements, such as uranium-235, are fissile. Washington Post, 28 Apr. 2022 The point is that by analyzing the array of radioactive fission products – those that can be captured and analyzed – nuclear forensic specialists can start to figure out if the atoms that fissioned were U-235, Pu-239, or (in some cases) U-238. Andrew Karam, Popular Mechanics, 7 Jan. 2016 Anyone can see that fissioning uranium 235 or plutonium can be used to generate electricity. Scientific American, 1 Jan. 2018 See More Word History
Etymology
Noun
borrowed from Latin fissiōn-, fissiō, from fid-, variant stem of findere "to split, cleave" + -tiōn-, -tiō, suffix of verbal action — more at bite entry 1
Verb
derivative of fission entry 1
First Known Use
Noun
circa 1617, in the meaning defined at sense 1
Verb
1929, in the meaning defined at intransitive sense
Time Traveler
The first known use of fission was circa 1617 Phrases Containing fission
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