3 ms·I'm glad you asked, because I was baffled myself when I couldn't find a definition in the article.by bigstrat2003 3y agoI'm glad you asked, because I was baffled myself when I couldn't find a definition in the article.RachelF 3y agoYes, in many ways it is not a well-written article for those outside the the field.ska 3y agoPerhaps because it was not written for those outside a particular field?