Sentence:  [...] the undertaker's wife opened a side door, and pushed Oliver down a steep flight of stairs into a stone cell, damp and dark: forming the ante-room to the coal-cellar, and denominated ‘kitchen'; wherein sat a slatternly girl, in shoes down at heel, and blue <WSD>worsted</WSD> stockings very much out of repair. 
Meaning of the word marked with <WSD> tags:  The fine, smooth fabric made from such wool yarn.