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Meaning of spinach-rhubarb

spin•ach-rhu•barb

Pronunciation: (spin'ich-r"bärb), [key]
— n.
  1. an Ethiopian plant, Rumex abyssinicus, of the buckwheat family, having leaves that are sometimes used as spinach and leafstalks sometimes used as rhubarb.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.