one of a series of rounded projections (or the notches between them) formed by curves along an edge (as the edge of a leaf or piece of cloth or the margin of a shell or a shriveled red blood cell observed in a hypertonic solution etc.)
CONCLUSION : The process of thymocyte apoptosis mediated by NO in mice is successively PS ectropion , mitochondrial depolarization , CL oxidation and cell crenation .
crenation