xiph·i·ster·num (zĭf'ĭ-stûr'nəm) n.
pl.xiph·i·ster·na (-nə) The posterior and smallest of the three divisions of the sternum, below the gladiolus and the manubrium. Also called xiphoid, xiphoid process.
Main Entry: xiphoid process Function: noun : the smallest and lowest division of the human sternum that is cartilaginous early in life but becomes more or less ossifiedduring adulthood called also ensiform cartilage,ensiform process