from The American Heritage® Dictionary of the English Language, 4th Edition
- n. An electronic circuit or device that detects and strengthens weak signals, as from a radio receiver, for subsequent, more powerful amplification stages.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. a voltage amplifier for amplifying a low-level input signal; its output is the input to a higher-level amplifier
Sorry, no etymologies found.