Dictionarydi•cha•siumPronunciation: (dī-kā'zhum, -zhē-um, -zē-um), [key] —n., —pl. -si•aPronunciation: (-zhē-u, -zē-u). [key] Bot. a form of cymose inflorescence in which each axis produces a pair of lateral axes. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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