EntityQ2778804· pop 13· linked from 174 articlesmesonic moleculeSign in to saveset of two or more mesons bound together by strong forceConnectionstauEntityup quarkEntitycharm quarkEntitydown quarkEntitytop quarkEntitystrange quarkEntitybottom quarkEntityatomEntitymoleculeEntityelectronEntityInternational Standard Book NumberEntityprotonEntityneutronEntityatomic nucleusEntityphotonEntityelementary particleEntityquarkEntitystrong interactionEntitynuclear physicsEntityparticle physicsEntityCategoriesHypothetical composite particles