Definition of whitlow grass
: any of several inconspicuous herbs formerly thought to cure whitlow: such as
a
: an annual weed (Draba verna) of Europe and North America with a rosette of basal leaves and tiny flowers succeeded by oblong pods — called also
shadflower
b
: a small Old World saxifrage (Saxifraga tridactylites)
c
: whitlowwort
