Welcome to the 1520 Perfect Dictionary
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| Lepton (1) | |
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| LEPTON (1) Definition: (physics) One of a group of four known fundamental particles, including the electron, muon, and two neutrinos, which have small or zero rest mass, spin quantum number 1/2 and which (except for the muon) are stable particles. ___________________________________ See perfect characteristic (1). See perfect particle (2). See perfect particularity (1). | |
1520 Products |
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1520 Products was established in 2005 with the purpose of entertaining and teaching us on key and important aspects of life (such as marriage, sex, etc) through the playing of games which will allow us to laugh but at the same time pass a message of what is the right or ideal way. |
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 1520 Sex Game |
 1520 Puzzles |
 1520 Marriage Game |