Adado (US and Canada,/ˈdeɪdoʊ/),housing (UK) ortrench (Europe) is a slot or trench cut into the surface of a piece of machinable material, usuallywood. When viewed in cross-section, a dado has three sides. A dado is cut across, or perpendicular to, thegrain and is thus differentiated from agroove which is cut with, or parallel to the grain. Dados are often used to affix shelves tocabinetry bodies. Similar to the dado, seerabbet (rebate).

• Athrough^[1] dado involves cuts which run between both edges of the surface, leaving both ends open.
• Astopped orblind^[2] dado ends before one (stopped) or both (blind) of the cuts meets the edge of the surface.^[1]
• Ahalf dado is formed with a narrow dado cut into one part, coupled with arabbet of another piece. This joint tends to be used because of its ability to hide unattractive gaps due to varying material thicknesses.^[3]

• Dado set
• Woodworking joints

• Joinery

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