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black horehoundBlack horse
black huckleberry
black humor
black humour
black ice
Black Jack Pershing
black kite
black knapweed
black knot
black larch
Black latten
Black lead
Black lemur
Black letter
Black list
-- black locust --
black lotion
black lovage
black lung
black lung disease
black magic
Black mail
black maire
black mallee
black mamba
Black man
Black manganese
black mangrove
black margate
Black Maria
black market
black marketeer
black locust
| Noun | 1. |  black locust - strong stiff wood of a black-locust tree; very resistant to decay |
| 2. |  black locust - large thorny tree of eastern and central United States having pinnately compound leaves and drooping racemes of white flowers; widely naturalized in many varieties in temperate regionsSynonyms: Robinia pseudoacacia, yellow locust |