Sentence:  Now that she had rested and had fed from the luncheon tray Mrs. Broome had just removed, she had reverted to her normal gaiety.  She looked cool in a grey tailored <WSD>cotton</WSD> dress with a terracotta scarf and shoes and her hair a black silk helmet. 
Meaning of the word marked with <WSD> tags:  The textile made from the fiber harvested from a cotton plant, especially "Gossypium".