Definitions:
a whirring sound, such as a phone ringing tone or the sound of cogs turning.

a rough edge or ridge left on an object (especially of metal) by the action of a tool or machine.

a small rotary cutting tool with a shaped end, used chiefly in woodworking and dentistry.

a siliceous rock used for millstones.

a prickly seed case or flower head that clings to clothing and animal fur.

denoting wood containing knots or other growths which show a pattern of dense swirls in the grain when sawn, used for veneers and other decorative woodwork

the coronet of a deer's antler.

make a whirring sound.

form a rough edge on (metal).