Sentence:  The water in Thor 's big swimming pool had been covered with a blanket of thick , foamy soapsuds - fashioned , of course , from ZING - Joyce had dived from the board into the pool , then swirled and cavorted in her luxurious `` bath '' while <WSD>cameras</WSD> rolled . 
Meaning of the word marked with <WSD> tags:  television equipment consisting of a lens system that focuses an image on a photosensitive mosaic that is scanned by an electron beam