Answer:
A knuckle joint in furniture refers to a type of joint used to connect two pieces of wood or other material at a right angle. It is named so because the joint resembles the knuckles of a clenched fist. This joint consists of interlocking fingers or projections on the ends of each piece of wood, which fit together to create a strong and secure connection. Knuckle joints are commonly used in chairs, tables, and other furniture pieces to provide stability and durability. A joint resembling a finger joint, as at separable leaves of a drop-leaf table.