The Collaborative International Dictionary
Orbiculate leaf
Orbiculate \Or*bic"u*late\, Orbiculated \Or*bic"u*la`ted\, a. Made, or being, in the form of an orb; having a circular, or nearly circular, or a spheroidal, outline.
Orbiculate leaf (Bot.), a leaf whose outline is nearly circular.
WordNet
orbiculate leaf
n. circular or nearly circular