pruning, n.
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The act of trimming, or removing what is superfluous. [1913 Webster]
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That which is cast off by bird in pruning her feathers; leavings. Beau. & Fl. [1913 Webster]
Pruning hook, or Pruning knife, cutting instrument used in pruning trees, etc. --
Pruning shears, shears for pruning trees, vines, etc.