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lead block

[leed]
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noun Nautical.
  1. any block that alters the direction of a rope; fairlead.
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Origin of lead block

First recorded in 1855–60
Also called leading block.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for lead block

Historical Examples

  • The four reactor cores in their lead cases went aboard last and were packed inside a pile of lead-block shielding.

    The Lani People

    J. F. Bone