In archeology, a denticulate tool is a stone tool

Stone tool

A stone tool is, in the most general sense, any tool made either partially or entirely out of stone. Although stone tool-dependent societies and cultures still exist today, most stone tools are associated with prehistoric, particularly Stone Age cultures that have become extinct...

that displays one or more edges that are worked into multiple notched shapes, much like the toothed edge of a saw. Indeed, these tools might have been used as saws, more likely for meat processing than for wood. It is possible, however, that some or all of these notches were used for smoothing wooden shafts or for similar purposes.

These tools are included in the Mousterian tool indrustry by Neanderthal culture, proceeded by small hand axes and side scrapers.