1
: a Eurasian hawkweed (Hieracium pilosella) introduced into North America that has soft hairy leaves and yellow flowers
2
: any of several plants other than mouse-ear that have soft hairy leaves
variants
or less commonly mouse-ear
: a Eurasian herb (Arabidopsis thaliana) naturalized as a weed in the U.S.
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Merriam-Webster unabridged



