对合

對合
duìhé
  1. a profit equal to the amount one invested
  2. (math.) involution

CEDICT

math

Entry Composition

1 对 duì
  1. right; correct
  2. towards; at; for
  3. concerning; regarding
  4. to treat (sb a certain way)
  5. to face
  6. (bound form) opposite; facing; matching
  7. to match together; to adjust
  8. to fit; to suit
  9. to answer; to reply
  10. to add; to pour in (a fluid)
  11. to check; to compare
  12. classifier: couple; pair
=2 合 hé
  1. to close
  2. to join
  3. to fit
  4. to be equal to
  5. whole
  6. together
  7. round (in battle)
  8. conjunction (astronomy)
  9. 1st note of pentatonic scale
  10. old variant of 盒 hé
=2 合 hé variant of 合 hé