Plant tissue consisting of cells which are actively dividing and giving rise to new cells; a region composed of such tissue, occurring esp. at the…

The innermost layer of an apical meristem, which gives rise to the central vascular tissue and pith.

= promeristem n. at pro-, prefix2 affix 1.

The outer zone or layer of the meristem or primary tissue of the youngest part of plants.

The outermost layer of an apical meristem, which develops into the outer cortex and dermatogen. Cf. mesomeristem, n.

Botany. = plerome, n. Obsolete. rare.

an apical meristem; spec. the region of a meristem comprising cells that have not yet undergone any of the changes associated with tissue…