[pol-ee-key-zhee-uhm, -zhuhm, -zee-uhm]
noun, plural polychasia [pol-ee-key-zhee-uh, -zhuh, -zee-uh] . Botany.
a form of cymose inflorescence in which each axis produces more than two lateral axes.

< Neo-Latin; see poly-, dichasium

polychasial, adjective
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World English Dictionary
polychasium (ˌpɒlɪˈkeɪzɪəm)
n , pl -sia
botany a cymose inflorescence in which three or more branches arise from each node
[C20: from New Latin, from poly- + -chasium as in dichasium]

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