any plant of the genus Gratiola, a bitter herb used medicinally.
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Also hedge-hys·sop [hej-his-uh p] /ˈhɛdʒˌhɪs əp/.
Words nearby hedge hyssop
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020
British Dictionary definitions for hedge hyssop
any of several North American scrophulariaceous plants of the genus Gratiola, esp G. aurea, having small yellow or white flowers
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012