from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A work consisting of three painted or carved panels that are hinged together.
- n. A hinged writing tablet consisting of three leaves, used in ancient Rome.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A picture or series of pictures painted on three tablets connected by hinges.
- n. A set of three se-tenant postage stamps that form a composite picture.
from the GNU version of the Collaborative International Dictionary of English
- n. A writing tablet in three parts, two of which fold over on the middle part.
- n. A picture or altarpiece in three compartments.
from The Century Dictionary and Cyclopedia
- n. A picture, carving, or other representation in three compartments side by side: most frequently used for an altar-piece.
- n. A series of writing-tablets, three in number, hinged or tied together.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. art consisting of a painting or carving (especially an altarpiece) on three panels (usually hinged together)
From Greek triptukhos, threefold : tri-, tri- + ptux, ptukh-, fold.(American Heritage® Dictionary of the English Language, Fourth Edition)
Ancient Greek tri- + πτυχή ("a fold"). (Wiktionary)