(n) the primary tissue of higher plants composed of thin-walled cells that remain capable of cell division even when mature; constitutes the greater part of leaves, roots, the pulp of fruits, and the pith of stems
The Collaborative International Dictionary of English (GCIDE) v.0.53 Collaborative International Dictionary (GCIDE)
n. [ NL., from Gr. pare`gchyma, fr. paregchei^n to pour in beside; para` beside + 'en in + chei^n to pour: cf. F. parenchyme. ] (Biol.) The soft cellular substance of the tissues of plants and animals, like the pulp of leaves, the soft tissue of glands, and the like. [ 1913 Webster ]