[W/K] :: barleycorn

  Barleycorn \Bar"ley*corn`\, n. [See Corn.]
     1. A grain or "corn" of barley.
        [1913 Webster]
  
     2. Formerly, a measure of length, equal to the average length
        of a grain of barley; the third part of an inch.
        [1913 Webster]
  
     John Barleycorn, a humorous personification of barley as
        the source of malt liquor or whisky.
        [1913 Webster]

  barleycorn
       n 1: a grain of barley
       2: a grain of barley [syn: barley]

  BARLEYCORN. A lineal measure, containing one-third of an inch. Dane's Ab. c. 
  211, a. 13, s. 9. The barleycorn was the first measure, with its division 
  and multiples, of all our measures of length, superfices, and capacity. Id. 
  c. 211, a. 1 2, s. 2.