el·e·men·ta·ry par·ti·cle
noun/ˌelɪmentri ˈpɑːtɪkl/
/ˌelɪmentri ˈpɑːrtɪkl/
(also fundamental particle)
(physics)- a very small piece of matter (= a substance), such as a quark, that does not contain within it any even smaller pieces of matter
基本粒子