Black-letter-day



an unlucky or tragic day.

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  • Black-light

    invisible infrared or ultraviolet light. Historical Examples The Brain Alexander Blade Legacy James H Schmitz noun the invisible electromagnetic radiation in the ultraviolet and infrared regions of the spectrum black light Invisible ultraviolet radiation. Black light causes certain fluorescent materials to emit visible light.

  • Black-light-trap

    a trap for insects that uses ultraviolet light as an attractant. Historical Examples Legacy James H Schmitz



  • Black-liquor

    (in making wood pulp for paper) the liquor that remains after digestion.

  • Black–list

    a list of persons under suspicion, disfavor, censure, etc.: His record as an anarchist put him on the government’s blacklist. a list privately exchanged among employers, containing the names of persons to be barred from employment because of untrustworthiness or for holding opinions considered undesirable. a list drawn up by a labor union, containing the […]



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