from The American Heritage® Dictionary of the English Language, 4th Edition
- A trademark used for a board with the alphabet and other symbols on it, and a planchette that is thought, when touched with the fingers, to move in such a way as to spell out spiritualistic and telepathic messages on the board.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A board, having letters of the alphabet and the words yes and no; used with a planchette during a seance to "communicate" with spirits.
from The Century Dictionary and Cyclopedia
- n. A form of planchette, consisting of a board marked with the letters of the alphabet and the ten numerals, and of the planchette proper, which (under the hand of the operator) moves over the board and touches certain letters and numerals and thus ‘answers’ questions.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a board with the alphabet on it; used with a planchette to spell out supernatural messages
Proprietary name, from French oui ("yes") + German ja ("yes"). (Wiktionary)