from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A work consisting of four or more painted or carved panels that are hinged together.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. a work consisting of multiple painted or carved panels joined together, often with hinges
from The Century Dictionary and Cyclopedia
- n. A combination of panels or frames, more than three in number, for receiving paintings on one or both sides of every leaf. Compare diptych and triptych. Maskell, Russian Art, S. K. M. Handbook.
From Late Latin polyptycha, registers, account books, from Greek poluptukha, from neuter pl. of poluptukhos, having many folds : polu-, poly- + ptukhē, fold; see diptych.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Ancient Greek πολύπτυχος ("with many folds"), from πολύς ("many") + πτυχή ("a fold"). (Wiktionary)