quantum chromodynamics: a theory of strong interactions between elementary particles (including the interaction that binds protons and neutrons in the nucleus); it assumes that strongly interacting particles (hadrons) are made of quarks and that gluons bind the quarks together
cuban bast: erect forest tree of Cuba and Jamaica having variably hairy leaves and orange-yellow or orange-red flowers; yields a moderately dense timber for cabinetwork and gunstocks