Definition of "pleroma"

In the second type only two separate meristem tissues are present in the tips of the roots; a pleroma and a common tissue, from which the primary bark and epidermis and root-cap proceed.

1876, Gardeners Chronicle & New Horticulturist - Volumes 5-6, page 750

And in the pleroma of the primary meristem of roots there is not only cambium (persistent parenchyma) and procambium (forerunner of fibres and vessels), but pericambium -- i.e., a special outer layer of the pleroma that remains for a long time as meristem.

1890, English Mechanic and World of Science - Volume 51, page 543

In the pleroma of hyacinth and pea roots, tmin increases along the meristem, especially in its basal part.

2001, Russian Journal of Developmental Biology, Volume 32, page 205

There is a way to comprehend the gnostic's giant onion of a world, the concentric circles, with the Pleroma beckoning there, the white heart of light, the source of that primal vision which for a second or two can recapture paradise.

1974, Lawrence Durrell, Monsieur, Faber & Faber, published 1992, page 141