natal plum: very large closely branched South African shrub having forked bright green spines and shiny leaves
carissa: a shrub of the genus Carissa having fragrant white flowers and plumlike red to purple-black fruits
soliton: (physics) a quantum of energy or quasiparticle that can be propagated as a traveling wave in nonlinear systems and is neither preceded nor followed by another such disturbance; does not obey the superposition principle and does not dissipate