Definitions for "Spreaders"
A horizontal struts to which shrouds or stays are attached, to support the mast and to spread rigging
Also crosstrees. Short horizontal struts extending from the mast to the sides of the boat, changing the upward angle of the shrouds.
The wooden or metal struts that are attached horizontally to the upper section of the mast, on both sides. They widen the angle of the shrouds, and thus provide a better support for the mast.