(a part of) a tool used for boring or drilling holes

tiny piece

the shell on the back of a tortoise etc

structure; covering

the outer covering (husks) of grain, removed before the brain is used

waste

a note with half the value of a semibreve

bit

the hard outer covering of eggs, nuts some seeds etc and of some animals (e.g. snails, crabs) or parts of them; seashell; the outside walls etc of a building, ship etc

structure; covering