Machinery .

a removable drilling or boring tool for use in a brace, drill press, or the like.

a removable boring head used on certain kinds of drills, as a rock drill.

a device for drilling oil wells or the like, consisting of a horizontally rotating blade or an assembly of rotating toothed wheels.

the mouthpiece of a bridle, having fittings at each end to which the reins are fastened.

anything that curbs or restrains.

the blade or iron of a carpenter's plane.

the cutting part of an ax or hatchet.

the wide portion at the end of an ordinary key that moves the bolt.

to put a bit in the mouth of (a horse).

to curb or restrain with, or as with, a bit.

to grind a bit on (a key). ?

take the bit in or between one's teeth

to cast off control; willfully go one's own way

He took the bit in his teeth and acted against his parents' wishes.

noun

whole

noun

atom , butt , chicken feed * , chip , chunk , crumb , dab , dash , division , dollop , dose , dot , driblet , droplet , end , excerpt , flake , fraction , fragment , grain , iota , item , jot , lick * , lump , mite , modicum , moiety , molecule , morsel , niggle , parcel , part , particle , peanuts , pinch , portion , sample , scale , scintilla , scrap , section , segment , shard , share , shaving , shred , slice , sliver , smidgen , snatch , snip , snippet , specimen , speck , splinter , sprinkling , stub , stump , taste , tittle , trace , tricklenotes:a bit is a single unit of computer information and a byte is a sequence of adjacent bits , usually eight , operated on as a unit by a computer , instant , jiffy , little while , minute , moment , second , space , spell , stretch , tick , whilenotes:a bit is a single unit of computer information and a byte is a sequence of adjacent bits , 0 , 1 , binary digit , binary unit , datanotes:a bit is a single unit of computer information and a byte is a sequence of adjacent bits , dram , drop , minim , ort , ounce , scruple , trifle , whit , mouthful , piece , paragraph , squib , story , time , while , routine* , brake , bridle , leash , restraint , snaffle , ace , bite , blade , check , curb , drill , granule , hair , minimum , morceau , mote , pittance , quanta , quantity , smack , snap , splice , tad , tincture , tinge , tool , vestige , wee

verb

brake , bridle , check , constrain , curb , hold , hold back , hold down , hold in , inhibit , keep , keep back , pull in , rein