Sentence:  Sche tok him thanne a maner <WSD>glu,</WSD> / The which was of so great vertu, / That where a man it wolde caste, / It scholde bind anon so faste / That noman mihte it don aweie. 
Meaning of the word marked with <WSD> tags:  A hard gelatin made by boiling bones and hides, used in solution as an adhesive; or any sticky adhesive substance.