Sentence:  Sassafras officinale, the Laurus sassafras, was introduced into Europe through France, and both wood and bark supply a volatile oil. ... The infusion of it was formerly much sold about the streets of London, at daybreak, modified with milk and sugar, under the name of <WSD>Saloop</WSD>, and chiefly made from this wood, though the true <WSD>Saloop</WSD> or Salep is an Orchis. 
Meaning of the word marked with <WSD> tags:  An aromatic drink originally prepared from salep and later from sassafras bark with other ingredients such as milk and sugar added, which was once popular in London, England.