" particles "

[Noun]  | "par*ti*cle" | \ ˈpär-ti-kəl \

1: a minute quantity or fragment

2: a relatively small or the smallest discrete portion or amount of something

3: a clause or article of a composition or document

Origin: 14th century ;

 Middle English, from Latin particula, from diminutive of part-, pars;

[Noun]  | "alpha particle" 

1: a positively charged nuclear particle identical with the nucleus of a helium atom that consists of two protons and two neutrons and is ejected at high speed in certain radioactive transformations —called also alpha, alpha radiation, alpha ray

Origin: 1903 ;

[Noun]  | "beta particle" 

1: a high-speed electron; specifically : one emitted by a radioactive nucleus in beta decay

Origin: 1904 ;

[Noun]  | "elementary particle" 

1: any of the particles of which matter and energy are composed or which mediate the fundamental forces of nature; especially : one whose existence has not been attributed to the combination of other more fundamental entities

Origin: 1934 ;

[Noun]  | "fundamental particle" 

1: elementary particle

Origin: 1901 ;

[Noun]  | "psi particle" | \ ˈsī- \

1: j/psi particle

Origin: 1974 ;

[Noun]  | "W particle" 

1: either of two particles about 80 times heavier than a proton that along with the Z particle are transmitters of the weak force and that can have a positive or negative charge

Origin: 1963 ;

 Eak;

[Noun]  | "particles" 

[Noun]  | "particle"