Sentence:  'But Alydon,' I persisted, 'the <WSD>Daleks</WSD> aren't human beings. They're just evil, half creatures, half machines, determined to destroy you.' 
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.