jewel block

noun Nautical.

a block at the end of a yard or gaff for supporting a signal or ensign halyard.

Origin of jewel block

First recorded in 1760–70

Also called dasher block.

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for dasher block

Historical Examples of dasher block

I suppose Nelson will order him to our fore-yard-arm as a jewel-block.
The Wing-and-Wing
J. Fenimore Cooper
There it hung, like a jewel-block, and every sign of life was soon taken away.
Afloat And Ashore
James Fenimore Cooper