Black-locust
Also called false acacia, yellow locust. a North American tree, Robinia pseudoacacia, of the legume family, having pinnate leaves and clusters of fragrant white flowers.
honey locust.
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- Black-lung
pneumoconiosis of coal miners, caused by coal dust; anthracosis. noun another name for pneumoconiosis black lung An occupational disease of coal miners caused by the long-term inhalation of coal dust, characterized by the presence of coal around the bronchioles on x-ray images. Most patients develop no symptoms, but a few advance to progressive obstruction of […]
- Black-magic
magic used for evil purposes; witchcraft; sorcery (contrasted with white magic). noun magic used for evil purposes by invoking the power of the devil
- Blackmail
any payment extorted by intimidation, as by threats of injurious revelations or accusations. the extortion of such payment: He confessed rather than suffer the dishonor of blackmail. a tribute formerly exacted in the north of England and in Scotland by freebooting chiefs for protection from pillage. to extort money from (a person) by the use […]
- Black-maple
a tree, Acer saccharum nigrum, of eastern and central North America, having furrowed, blackish bark and yellow-green flowers.
- Black-margate
a grayish grunt, Anisotremus surinamensis, of the Atlantic Ocean from Florida to Brazil.