from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Having three leaves or leaflike parts, as in the trillium.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Comprising, abounding with, or featuring trefoils.
from the GNU version of the Collaborative International Dictionary of English
- adj. Having three leaves or leaflets, as clover. See Illust. of shamrock.
from The Century Dictionary and Cyclopedia
- Having three leaves; trefoil; specifically, in botany, having three leaves or leaflets: used chiefly, in the latter sense, of compound leaves, as a shortened form of trifoliolate. See cut d under leaf.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. (of a leaf shape) having three leaflets
tri- ("three") + Latin foliātus ("leaved") (Wiktionary)