Sentence:  They turned to polar bear feces, or <WSD>scat</WSD>, as it is commonly called. ... She and Quinoa [a dog] worked with Dr. Rockwell to collect and study samples of polar bear <WSD>scat</WSD> for several years and found that the bears were eating lots of geese. 
Meaning of the word marked with <WSD> tags:  Animal excrement; droppings, dung.