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slaught-boom

slaught-boom Obs.
  In 7 slaught bome, slaght-boome.
  [ad. Du. or LG. slagboom (hence Da. and Sw. slagbom), = G. schlagbaum, f. slagen to strike, fall, and boom beam, tree.]
  A beam used as a barrier.

1637 Monro Exped. 7 The Castell..with Moates, Draw⁓bridges, and slaught bomes without all. 1642 Relat. Action before Cirencester 4 Each end of the high street..was secured against Horse with strong slaght-boomes which our men call Turne-pikes.

Oxford English Dictionary

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