Also called freight ton . a unit of volume for freight that weighs one ton, varying with the type of freight measured, as 40 cubic feet of oak timber or 20 bushels of wheat. 3. metric ton. 4. displacement ton. 5. a unit of volume used in transportation by sea, commonly equal to 40 cubic feet (1.13 cu. m).
When in a biological process, less specialized cells evolves into more specialized ones, the process is called as cell differentiation. This process is mostly seen in multicellular organisms.
The term cell growth is used in the contexts of cell development and cell division (reproduction).When used in the context of cell division, it refers to growth of cell populations, where a cell, known as the mother cell, grows and divides to produce two  daughter cells  (M phase). cell is unable to get too small because the later cell cycle events, such as S, G2, and M, are delayed until mass increases sufficiently to begin S phase. Many of the signal molecules that convey information to cells during the control of cellular differentiation or growth are called growth factors.