Noble hops,
From The Oxford Companion to Beer
a term that has an undeniable ring of antiquity and distinction to it, yet is merely a marketing tag and of recent vintage at that. The term was created in the United States only sometime in the 1980s and has no technical meaning. It was meant to set apart from the world’s hundreds of hop varieties a select few, venerable Continental European ones with fairly low alpha acid and fairly high essential oil contents. These were initially the German Hallertauer Mittelfrueh, Spalter, and Tettnanger, and the Czech Saaz from the Žatec region of Bohemia.
This definition is from The Oxford Companion to Beer, edited by Garrett Oliver. © Oxford University Press 2012.