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Webster 1913 Edition

Noun.

A diarrhea or flux.

[Obs.]

Holland.

See also: läsk and läsk'

lask ‎(plural lasks)

Diarrhoea (now only of animals).
- 1621, Robert Burton, The Anatomy of Melancholy, New York Review of Books, 2001, p.263:
  A grave and learned minister, and an ordinary preacher at Alkmaar in Holland, was (one day as he walked in the fields for his recreation) suddenly taken with a lask or looseness, and thereupon compelled to retire to the next ditch […].
- 1653, Nicholas Culpeper, The English Physician, Folio Society 2007, p. 150:
  The emulsion or decoction of the seed stays lasks and continual fluxes, eases the colic, and allays the troublesome humours in the bowels […].