tooth wound

The worm or tangent screw w is simply one long tooth wound around a cylinder, and its form may be determined by the rules laid down for a rack and pinion, the tangent screw or worm being considered as a rack and the wheel as an ordinary spur-wheel.

A party some days after dined with the old gentleman, and after dinner the story of the skirmish turned up, as a matter of course, and the enormous size of the tooth wound up the tedious tale.