from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Having three parts; threefold.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Having three parts; triple.
from the GNU version of the Collaborative International Dictionary of English
- adj. Threefold.
from The Century Dictionary and Cyclopedia
- Threefold; triple.
Late Latin trīnālis, from Latin trīnus, trine; see trine.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Late Latin trinalis. (Wiktionary)