di·cha·si·um (dī-kā'zē-əm, -zhē-əm, -zhəm) n.
pl.di·cha·si·a (-zē-ə, -zhē-ə, -zhə) A cyme having two lateral flowers or branches originating from opposite points beneath a terminal flower.
[New Latin, from Greek dikhasis, division, from dikhazein, to divide in two, from dikha, in two; see dwo- in Indo-European roots.] di·cha'si·al (-zē-əl, -zhē-əl, -zhəl) adj., di·cha'si·al·ly adv.