Sentence:  Another natural sweetener comes from the <WSD>stevia</WSD> plant. In December 2008, the Food and Drug Administration (FDA) gave a “generally recognized as safe” status to Truvia and PureVia, both of which are wholly derived from the <WSD>stevia</WSD> plant and have no calories. 
Meaning of the word marked with <WSD> tags:  Any of the sweet herbs of genus "Stevia", native to tropical and subtropical regions of South America and western North America. (from 19th c.)