The following terms define Building and Machine Parts
abutment: plane or point designed to give support or withstand thrust, especially on projecting part of structure.
adapter: connector that enables different parts or devices to fit or function together.
anchor bolt: threaded rod embedded in foundation for support and stabilization of wood sill.
angle iron: metal brace used to reinforce comers or angles.
angle rafter: rafter in sloping roof.
aperture: usually narrow opening, slit, or crack.
apron: plate or covering for mechanical device that protects its operator; interior trim beneath window stool.
arbor: short spindle that supports rotating machine part.
arm: small extension attached horizontally at angle to large base.
axle: shaft or spindle that supports rotating wheel.