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superweak
superweak adj. 
/ˌsjuːpəˈwiːk/,
Brit. /ˌsuːpəˈwiːk/
, /ˌsuːpəˈwiːk//ˌsjuːpəˈwiːk/U.S. /ˌsupərˈwik/
extremely weak; (Particle Physics) designating a proposed interaction several orders of magnitude weaker than the weak interaction which would not be invariant under charge conjugation and space inversion jointly; of or relating to such a force./ˌsupərˈwik/ΘΚΠ
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superweak1959
1959 Y. Yamaguchi in Progr. Theoret. Physics 22 373 There may exist extremely weak interactions called here ‘super’-weak interactions, which are much weaker than usual interactions.
1979 D. C. Cheng & G. K. O'Neill Elem. Particle Physics ix. 206 If the Wolfenstein model is correct, there exists a ‘superweak’ fifth force in nature.
1994 R. Harweg in W. Nöth Origins of Semiosis 309 Its deictic or semideictic nature is an extremely weak one, or as I have called it elsewhere..a ‘superweak’ one.
2004 F. Giovannelli & L. Sabau-Graziati Impact Space Exper. 26 The super-weak model does not predict such an effect.
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