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- antidepressant 113
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- adjectival 120
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- mollusk 66
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- nothingness 71
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- redcoat 65
- bungler 69
- peristyle 43
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- immature 76
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- humanism 75
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- boot 512
- domesday 71
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- manila 66
- crank out 77
- denote 148
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- mama 76
- gymnasium 420
- Coax 118
- emulation 105
- quartermaster 50
- golden retriever 86
- membership 190
- rerun 92
- outcries 45
- malaria 102
- Integral 205
- childminder 99
- incorporate 218
- featherweight 105
- Inure 37
- tip-off 43
- death 522
- mantis 70
- warrant 367
- determine 540
- ferment 426
- reconnoitre 46
- Invert 157
- give over to 83
- dishonor 245
- pregnancy 129
- Allowance 166
- millstone 56
- Emmy 54
- uneasy 500
- portion 567
- unwind 170
- Blush 197
- bake 549
- hellenistic 46
- recruiter 129
- Prevention 231
- point of sale 112
- advantageous 192
- twit 79
- Dwarf 177
Did you know?
When scientists first used fissile back in the 1600s, the notion of splitting the nucleus of an atom would have seemed far-fetched indeed. In those days, people thought that atoms were the smallest particles of matter that existed and therefore could not be split. Fissile (which can be traced back to Latin findere, meaning "to split" or "to cleave") was used in reference to things like rocks. When we hear about fissile materials today, the reference is usually to nuclear fission: the splitting of an atomic nucleus that releases a huge amount of energy. But there is still a place in our language for the original sense of fissile (and for the noun fissility, meaning "the quality of being fissile"). A geologist, for example, might refer to slate as being fissile.
Example Sentences
Recent Examples on the Web This was eliminated in the final draft which calls for the immediate start of negotiations on a treaty banning production of fissile material. 
Edith M. Lederer, ajc, 26 Aug. 2022 Most atoms do not fission, but the isotopes of certain elements, such as uranium-235, are fissile. Washington Post, 28 Apr. 2022 But given Iran’s advancements since the original deal, Tehran is currently enriching uranium at up to 60 percent purity, producing uranium metal, and hiding stockpiles of fissile material from the IAEA. The Editors, National Review, 4 Mar. 2022 This is the ability to put enough pressure on the fissile material to detonate it and create a nuclear yield. CBS News, 5 Jan. 2022 The nation’s output of uranium—a fissile material for nuclear weapons when enriched—is just a fraction of what could be produced, according to new research from Stanford University’s Center for International Security and Cooperation. Timothy W. Martin, WSJ, 4 Nov. 2021 And this means that Iran can distribute this capacity to a place that might be difficult to attack, difficult to discover and would allow Iran to quickly develop the fissile material for a weapon. CBS News, 3 Nov. 2021 Th-232 captures a neutron and converts to U-233 which is also fissile and begins providing more neutrons and more power. James Conca, Forbes, 6 Oct. 2021 The North’s production of fissile materials violates multiple resolutions from the UN Security Council, which has sought to stop the country from developing nuclear warheads, with little success. BostonGlobe.com, 30 Aug. 2021 See More
Edith M. Lederer, ajc, 26 Aug. 2022 Most atoms do not fission, but the isotopes of certain elements, such as uranium-235, are fissile. Washington Post, 28 Apr. 2022 But given Iran’s advancements since the original deal, Tehran is currently enriching uranium at up to 60 percent purity, producing uranium metal, and hiding stockpiles of fissile material from the IAEA. The Editors, National Review, 4 Mar. 2022 This is the ability to put enough pressure on the fissile material to detonate it and create a nuclear yield. CBS News, 5 Jan. 2022 The nation’s output of uranium—a fissile material for nuclear weapons when enriched—is just a fraction of what could be produced, according to new research from Stanford University’s Center for International Security and Cooperation. Timothy W. Martin, WSJ, 4 Nov. 2021 And this means that Iran can distribute this capacity to a place that might be difficult to attack, difficult to discover and would allow Iran to quickly develop the fissile material for a weapon. CBS News, 3 Nov. 2021 Th-232 captures a neutron and converts to U-233 which is also fissile and begins providing more neutrons and more power. James Conca, Forbes, 6 Oct. 2021 The North’s production of fissile materials violates multiple resolutions from the UN Security Council, which has sought to stop the country from developing nuclear warheads, with little success. BostonGlobe.com, 30 Aug. 2021 See More Word History
Etymology
borrowed from Latin fissilis "easily split," from fid-, variant stem of findere "to split, cleave" + -tilis "subject to, susceptible to (the action of the verb)" — more at bite entry 1
First Known Use
1661, in the meaning defined at sense 1
Time Traveler
The first known use of fissile was in 1661 👨🏻🏫 Mr. Ng 韋氏詞典 📚 – mw.mister5️⃣.net
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