a radio receiver that moves automatically across some selected range of frequencies looking for some signal or condition | any device that receives a signal or stimulus (as heat or pressure or light or motion etc.) and responds to it in a distinctive manner |
a radar dish that rotates or oscillates in order to scan a broad area | electronic equipment that detects the presence of radio signals or radioactivity |
an electronic device that generates a digital representation of an image for data input to a computer | rectifier that extracts modulation from a radio carrier wave |
someone who scans verse to determine the number and prosodic value of the syllables | |