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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
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Merriam-Webster unabridgedWords at Play
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