Weeder n. : One who, or that which, weeds, or frees from anything noxious.

Example:
Will my grass turn green again after I sprayed Bermuda Weeder?

Taxonomy
Weeder, free encyclopedia, fulcrum, ground, the Cape, Cape Cod, weeds, search, weeding, tools, split tip, tongue, models, piece of metal, metal piece, acts, Personal tools, head points.

Defination from the web:
weeder has a split tip like a serpent's tongue, and a long thin handle. ... The Cape Cod weeder has a thin, long handle and a triangular scraping head. When the handle is held parallel to the ground, the head points downward. ...