Meaning of polychasium

pol•y•cha•si•um

Pronunciation: (pol"ē-kā'zhē-um, -zhum, -zē-um), [key]
— pl. -si•a
  1. a form of cymose inflorescence in which each axis produces more than two lateral axes.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.