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 (mŏn′ə-kā′zē-əm, -zhē-)
n. pl. mon·o·cha·si·a (-zē-ə, -zhē-ə, -zhə)
A cyme having only one lateral flower or branch originating from beneath a terminal flower, resulting in a helicoid or scorpiod inflorescence.

mon′o·cha′si·al adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


n, pl -sia (-zɪə)
(Botany) botany a cymose inflorescence in which each branch gives rise to one other branch only, as in the forget-me-not and buttercup. Compare dichasium
[C19: mono- + -chasium as in dichasium]
ˌmonoˈchasial adj
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˌmɒn əˈkeɪ ʒi əm, -ʒəm, -zi əm)

n., pl. -si•a (-ʒi ə, -ʒə, -zi ə)
a cymose inflorescence having a single main stem.
[1885–90; < New Latin; see mono-, dichasium]
mon`o•cha′si•al, adj.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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Flower erect to pendulous, arising on a ebracteate stalk directly from the leaf rosette (monochasium with condensed internodes), rarely subsessile or pedicel (2-) 3-10 (-20) cm long during anthesis, pentamerous.
monochasium. A type of inflorescence in which there is a single terminal flower, and below this a single branch bearing one or more younger flowers; variations of coiled and zigzag patterns include helicoid, cincinnus, bostryx, and scorpioid.
A monochasial cyme, or monochasium (MON-oh-kay-zee-um), has one division (see Figure 9-12).