Source : Webster's Revised Unabridged Dictionary (1913)

Merismatic \Mer`is*mat"ic\, a. [Gr. ? division, fr. ? part.]
   (Biol.)
   Dividing into cells or segments; characterized by separation
   into two or more parts or sections by the formation of
   internal partitions; as, merismatic growth, where one cell
   divides into many.