\Whit"low\, n. [Prov. E. whickflaw, for quickflaw, i.
e., a flaw or sore at the quick; cf. Icel. kvika the quick
under the nail or under a horse's hoof. See {Quick}, a., and
{Flaw}.]
1. (Med.) An inflammation of the fingers or toes, generally
   of the last phalanx, terminating usually in suppuration.
   The inflammation may occupy any seat between the skin and
   the bone, but is usually applied to a felon or
   inflammation of the periosteal structures of the bone.
2. (Far.) An inflammatory disease of the feet. It occurs
   round the hoof, where an acrid matter is collected.
{Whitlow grass} (Bot.), name given to several inconspicuous
   herbs, which were thought to be a cure for the whitlow, as
   {Saxifraga tridactylites}, {Draba verna}, and several
   species of {Paronychia}.