In carpentry, what does the term 'knots' refer to?

The term 'knots' in carpentry specifically refers to imperfections in wood that occur where branches grew from the trunk of the tree. These knots are a natural feature of wood and arise from the growth process of the tree. When branches grow, they create a denser area of wood which can vary in size and shape.

Knots can affect the appearance and workability of the wood; they may create challenges during cutting, planing, and finishing. Additionally, they can influence the strength and stability of the finished product. Understanding knots is essential for carpenters, as the presence and quality of knots can significantly impact both the aesthetic and structural properties of wood products.