nib

1 the jaws of a bird together with their hornlike covering <a finch cracking seeds in its nib> Synonyms bill, neb, beakRelated Words mouth; muzzle; mandible, maw, maxilla

2 the last and usually sharp or tapering part of something long and narrow <make sure the nib has been sharpened before you try to cut anything> Synonyms apex, cusp, end, point, nose, pike, tipRelated Words pinpoint; prong, tine; barb, jag, prickle, snag, spike, sticker