from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A television camera pickup tube, more sensitive than the iconoscope, that uses a low-velocity electron beam to scan a photoactive mosaic. Also called image orthicon.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. TV camera tube.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a now obsolete picture pickup tube in a television camera; electrons emitted from a photoemissive surface in proportion to the intensity of the incident light are focused onto the target causing secondary emission of electrons
orth(o)- + icon(oscope).(American Heritage® Dictionary of the English Language, Fourth Edition)