n.1.(Bot.) A white-flowered rosaceous shrub (Neillia opulifolia, or Spiræa opulifolia), common in the Northern United States. The bark separates into many thin layers, whence the name.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
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Nine-bark Press, Director of the Georgia Poetry Circuit, and Professor