Anlage Kern NMR alpha particle antibaryon antilepton antimeson atomic nucleus atomic particle axiom axis baryon basichromatin beta particle bud center center of action center of gravity centroid centrum chromatin chromatin strands core dead center diameter diaphragm egg electron elementary particle elixir embryo epicenter equator essence essential flower focus fundamental germ germen gist gravamen heart heterochromatin hub hypostasis inner essence interior karyosome karyotin kernel lepton loins macronucleus marrow mean meat median medulla meganucleus meson metacenter micronucleus middle midmost midriff midst nave navel neutron nub nuclear force nuclear magnetic resonance nuclear particle nuclear resonance nucleolus nucleon nucleosynthesis nuts and bolts omphalos ovum photon pith pivot plasmosome postulate principle proton quid quiddity quintessence rudiment sap seed soul spark spermatozoon spirit storm center strangeness strong interaction stuff substance the nitty-gritty thick thick of things triton umbilicus valence electron waist waistline zone