top-block

1 definition found

top-block - Collaborative International Dictionary of English v.0.48 :

  Top-block \Top"-block`\, n. (Naut.)
     A large ironbound block strapped with a hook, and, when used,
     hung to an eyebolt in the cap, -- used in swaying and
     lowering the topmast. --Totten.
     [1913 Webster]