Growth : Growth may be defined as permanent or irreversible change in the size of a cell, organ or whole organism usually accompanied by an increase in dry weight.

Differentiation : Differentiation is the process whereby cells undergo few to major structural changes that lead to the maturation. The cells mature to perform specialized functions. 

Development: Development includes all the series of changes which an organism goes through during its life cycle.

Dedifferentiation : It is the process by which the living differentiated cells which had lost the capacity to divide regain  the capacity to divide under certain conditions.

Redifferentiation : Redifferentiation is defined as maturation or differentiation of dedifferentiated tissues.

Determination growth . The ability of a cell, tissue or the organism to grow for a limited period is called determinate growth.

Meristem : Meristem is a group of cells which have power of division and add new cells to the body.

Growth rate : It is the increased growth per unit time.