Source : Webster's Revised Unabridged Dictionary (1913)

Parenchyma \Pa*ren"chy*ma\, n. [NL., from Gr. ?, fr. ? to pour
   in beside; ? beside + ? in + ? to pour: cf. F. parenchyme.]
   (Biol.)
   The soft celluar substance of the tissues of plants and
   animals, like the pulp of leaves, to soft tissue of glands,
   and the like.

Source : WordNet®

parenchyma
     n 1: animal tissue that constitutes the essential part of an
          organ as contrasted with e.g. connective tissue and
          blood vessels
     2: 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