Sentence:  Aretæus recommends moderate venæsection to be repeated, if the patient is plethoric, purging with black <WSD>hellebore</WSD>, and in some cases emetics; nourishing diet. 
Meaning of the word marked with <WSD> tags:  Any of the common garden flowering plants of the genus "Helleborus", in family Ranunculaceae, having supposed medicinal properties.