Search Result for "charm quark":
Wordnet 3.0

NOUN (1)

1. a quark with an electric charge of +2/3 and a mass 2900 times that of an electron and a charm of +1; 



WordNet (r) 3.0 (2006):

charm quark
    n 1: a quark with an electric charge of +2/3 and a mass 2900
         times that of an electron and a charm of +1