a block having two sheaves or pulleys.
double rainbowRead more in this article about some frequently asked questions and fun facts related to our definitions.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for double block
An iron thimble, large enough to hook the double-block of a side or train tackle, is spliced into the end of each purchase-fall.Ordnance Instructions for the United States Navy.|Bureau of Ordnance, USN