Biological process

cell growth along one axis, cell growth in one dimension, cell morphogenesis by unidimensional growth, polar cell growth, polarized cell growth

The process in which a cell irreversibly increases in size in one [spatial] dimension or along one axis, resulting in the morphogenesis of the cell.

Unidimensional cell growth refers to a change in both cell size and cell shape. For cell shape changes where cell size is not affected, consider instead the term 'regulation of cell shape ; GO:0008360' and its children.