WordReference Random House Unabridged Dictionary of American English © 2017
re•duc•i•ble  (ri do̅o̅sə bəl, -dyo̅o̅-),USA pronunciation adj. 
  1. capable of being reduced.
  2. Mathematics
    • of or pertaining to a polynomial that can be factored into the product of polynomials, each of lower degree.
    • of or pertaining to a group that can be written as the direct product of two of its subgroups.
    • of or pertaining to a set whose set of accumulation points is countable.
re•duc′i•bili•ty, re•duci•ble•ness, n. 
re•duci•bly, adv. 
  • 1400–50; late Middle English; see reduce, -ible

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