fine adjustment knob.
Kentuck Knob was created in 1956.
in a microscope their is a knob referred to as "fine focus knob" it is meant to change the distance between the lens and the platform.
Focusing, its called a focusing knob.
Peak
Outrigger
A cog is a wheel with projecting teeth. These can turn either another cog or a chain.
A knurl /nərl/ is a small projecting knob or ridge, especially in a series around the edge of something.
trap
the incus
uvula
triticeal cartilage
pommel
Projecting Nothing was created in 2005.
Projecting words onto cathedrals
"Projecting" in this case means "sticking out." So a sharp projecting edge is a sharp edge that sticks out.
a rock sticking up (or projecting) out of the ground is called an outcrop.