A deviation or bend from a straight true surface in wood is known as a ________.

A deviation or bend from a straight true surface in wood is known as a crook. A crook specifically refers to a curvature along the length of a piece of lumber, where one edge bows out while the opposite edge remains straight. This type of distortion can significantly affect the quality and usability of the wood in construction and carpentry.

Understanding the terminology related to wood deformation is essential for contractors and builders to ensure that materials meet their specifications and performance standards. Other terms like warp, sway, and bend are related to wood distortion but have distinct meanings. Warp refers to any deviation from a flat plane, encompassing various forms like cupping, bowing, or twisting, while sway typically refers to lateral movement in a structural context. Bend can describe a general curvature but doesn't specifically define the type of distortion found in lumber as accurately as crook does. This specificity in terminology is vital for correctly assessing and addressing any issues with lumber used in construction projects.