part of posterior lateral line neuromast hair cell development neuromast hair cell morphogenesis posterior lateral line neuromast hair cell morphogenesis The change in form (cell shape and size) that occurs when a posterior lateral line neuromast hair cell progresses from its initial formation to its mature state. A neuromast hair cell is a hair cell that acts as a sensory receptor of the neuromast; it is morphologically polarized as a result of the relative position of the single kinocilium and the clusters of stereocilia on its apical surface. 2011-02-14T11:08:14Z bf GO:0035680 biological_process