WordReference Random House Unabridged Dictionary of American English © 2025
pol•y•cha•si•um
(pol′ē kā′zhē əm, -zhəm, -zē əm),USA pronunciation n., pl. -si•a (-zhē ə, -zhə, -zē ə).USA pronunciation [Bot.]
pol′y•cha′si•al, adj.
- Botanya form of cymose inflorescence in which each axis produces more than two lateral axes.
- Neo-Latin; see poly-, dichasium