spreader

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun One that spreads, as.
• noun A butter knife.
• noun A farm or garden implement for scattering fertilizer or seed.
• noun A device, such as a bar, for keeping wires or stays apart.
• noun Nautical A horizontal support used to spread shrouds on a mast.

from The Century Dictionary.

• noun One who or that which spreads, One who or that which expands, outspreads, or spreads abroad. See spread, v. i.
• noun One who or that which extends, diffuses, disseminates, etc. See spread, v. t.
• noun In flax-manuf., a machine for drawing and doubling flax from the heckles, and making it into slivers; a drawing-frame.
• noun In cotton manufacturing, same as lapper, 2.
• noun A device fitted to the nozle of a hose for causing the stream to spread into a thin fan of spray; a form of spray-nozle.
• noun A bar, commonly of wood, used to hold two swingletrees apart, and thus form a substitute for a doubletree for a plow, stone-boat, cart, etc.

from the GNU version of the Collaborative International Dictionary of English.

• noun One who, or that which, spreads, expands, or propagates.
• noun A machine for combining and drawing fibers of flax to form a sliver preparatory to spinning.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun An object or person who spreads.
• noun A spacer or device for keeping two objects apart.
• noun A device used to spread bulk material.
• noun A knife or spatula used to distribute a substance such as butter or jelly.
• noun nautical A horizontal athwartships spar attached to the mast of a sailboat in order to extend the shrouds away from the mast.
• noun A machine for combining and drawing fibers of flax to form a sliver preparatory to spinning.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a hand tool for spreading something
• noun a mechanical device for scattering something (seed or fertilizer or sand etc.) in all directions