золотник

Noun

 * 1)   zolotnik an old Russian unit of weight, equal to 1/96 of a pound or approximately 4.266 grams
 * 2)  a scruple, an ounce a very small quantity of something
 * 3)  prospector
 * 4)  piston, slide
 * 5)   piston valve
 * 1)   piston valve