Definition of Hypericum
: a large and widely distributed genus of herbs or shrubs (family Guttiferae) that are characterized chiefly by their pentamerous and often showy yellow flowers
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Origin and Etymology of hypericum
New Latin, from Latin hypericum, hypericon a plant, St.-John's-wort, ground pine, from Greek hyperikon, hypereikos, a plant, St.-John's-wort, probably from hypo- + ereikē heath, heather — more at briar
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