FIDD, an iron pin used at sea to splice or fasten ropes together; it is made tapering and sharp at one end.

There are also fidds of wood, which are much larger than the iron ones.

The pin also in the heel of the topmalt, which bears it upon the chiefs-tree, is called a fidd.

Fidd-Hammer, is used for a hammer, the handle of which is a fidd, or made tapering into that form.