[i-lek-tron-rey] 
| a small cathode-ray tube having a fluorescent screen on which the pattern varies with the voltage applied to the grid: used chiefly in radio receivers to indicate accuracy of tuning. |
[foh-toh-sel] | a solid-state device that converts light into electrical energy by producing a voltage, as in a photovoltaic cell, or uses light to regulate the flow of current, as in a photoconductive cell: used in automatic control systems for doors, lighting, etc. |
| photocell (fō'tō-sěl') Pronunciation Key
See photoresistor. |