A Dado is term used in woodworking. A dado is a 3 sided, squared cut out or “slot” milled into wood using a dado blade or a series of stacked dado blades set to the desired thickness.

A dado has many uses. It can be used to join two pieces of wood together that are tightly fit or made to have something like a drawer slide in. Many other uses uses include doors, windows, and kitchen cabinetry to name a few.

The Dado is similar to the rabbet except it has one extra side and can sometimes be made by the same tool as well.