Sentence:  [<WSD>Mirach</WSD> was described in the "Alfonsine Tables" of 1521 as "super mirat", from which has been derived its present title, as well as the occasional forms Mirac, Merach, Mirar, Mirath, Mirax, etc.; "mirat" probably coming from the 1515 "Almagest's super mizar", the Arabic mi'zar, a girdle or waist-cloth. Scaliger, the great critical scholar of the 15th century, adopted this Mizar as a title, and Riccioli followed him in its use, thus confounding the star with ζ Ursae Majoris.] 
Meaning of the word marked with <WSD> tags:  A (red giant), visible as a second-(magnitude) orange-red (star) marking the waist or (girdle) of the chained woman in the northern (constellation) of (Andromeda).