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dichasial

dichasial, a. Bot.
  (daɪˈkeɪzɪəl)
  [f. next + -al1.]
  Belonging to or of the nature of a dichasium.

1876 J. H. Balfour in Encycl. Brit. IV. 124/1 In the natural order Caryophyllaceæ, the dichasial cymose form of inflorescence is very general.

Oxford English Dictionary

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