noun
number of leaves; number of sheets
Used especially for counting leaves (double-sided pages) in traditional Japanese-style bound books, but can also refer to sheets in general.
この和綴じ本の丁数は五十丁です。
This Japanese-bound book has fifty leaves.
印刷所に丁数を伝えてください。
Please tell the printer the number of sheets.
noun
Rare or specialized use; the more common word for 'even number' is 偶数 (ぐうすう).
See also: 偶数
古い文献では、丁数が偶数を意味することがある。
In old documents, 丁数 can mean an even number.