a herbaceous plant with spikes of small fragrant greenish flowers.
Genus Reseda, family Resedaceae: several species, in particular the North African R. odorata, which is cultivated as an ornamental and for its essential oil, and the European wild mignonette (R. lutea)
early 18th century: from French mignonnette, diminutive of mignon 'small and sweet'
mignonette in other Oxford dictionaries
Definition of mignonette in the US English dictionary