Sentence:  Then the <WSD>Dalek</WSD> turned and picked off the other passengers one by one. It screamed... 'Exterminate! Exterminate! Exterminate!' 
Meaning of the word marked with <WSD> tags:  A member of a species of extraterrestrial cyborg mutants who appear in the television programme "Doctor Who" and are known for travelling in metallic shells, having monotone, mechanically distorted voices, repeating a limited number of phrases, and being bent on exterminating other beings mercilessly.