Sentence:  'Ay, ay; she wore a flowered silk <WSD>tabby</WSD> sacque, on band days,' said Toole, who had an eye and a corner in his memory for female costume, 'a fine showy—I remember.' 
Meaning of the word marked with <WSD> tags:  A kind of waved silk, usually called watered silk, manufactured like taffeta, but thicker and stronger. The watering is given to it by calendering.