Question: what is an adz? 

Answer: I think you mean "adze."  It's a tool:\nThe tool known as the adze [pronounced adds] serves for smoothing rough-cut wood in hand woodworking. Generally, the user stands astride a board or log and swings the adze downwards towards their feet, chipping off a piece of wood, and walking backwards as they go, leaving a relatively smooth surface behind. However, in general usage, the adze can be used for other cutting operations.\n\nThe head of the adze is oriented to the haft like a hoe, or plane, and not like an axe, whose cutting blade would be perpendicular to the blade of an adze.
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