whisker

Short definition from Wiktionary

Noun

1. 1
   That part of the beard which grows upon the sides of the face, usually of the male, or upon the chin, or upon both.
2. 2
   A hair of the beard.
3. 3
   One of the long, projecting hairs growing at the sides of the mouth of a cat, or other animal.
4. 4
   The (very small) distance between two things.
5. 5
   Spreaders from the bows to spread the bowsprit shrouds.
6. 6
   A graphic element that shows the maxima and minima in a box plot.
7. 7
   One who, or that which, whisks, or moves with a quick, sweeping motion.
8. 8
   A small tendril that forms on metal.

Proper noun

1. 1
   A surname.