Sentence:  Although the beauty of <WSD>houris</WSD> is described in terms of cosmic pureness and sumptuary materials, the qiyan are understood through attributes and affects. Yet, the <WSD>houris</WSD> have one constitutive attribute. They are fair and they have big eyes. Is the <WSD>houri</WSD> based on any particular model of beauty or a kind of female slave? Ibn Butlan, in his Risalafi shira'al-raqiq wa-taqlib al-abid, offers a rubric for female slaves; however, the descriptions of <WSD>houris</WSD> do not align with other descriptions of  slaves. 
Meaning of the word marked with <WSD> tags:  A nymph in the form of a beautiful virgin supposed to dwell in Paradise for the enjoyment of the faithful.