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whip-and-tongue graft

American  
[hwip-uhn-tuhng, wip-] / ˈʰwɪp ənˈtʌŋ, ˈwɪp- /

noun

Horticulture.
  1. a graft prepared by cutting both the scion and the stock in a sloping direction and inserting a tongue in the scion into a slit in the stock.