1) Smooth 
• (a.) Having a slightly undulating margin; -- said of leaves.
with an undulating margin, less strongly wavy than 'sinuate'
with an undulating margin, less strongly wavy than 'sinuate'
With a shallowly wavy margin.
Re·pand' adjective [ Latin repandus bent backward, turned up; prefix re- re- + pandus bent, crooked.] (Bot. & Zool.) Having a slightly undulating margin; -- said of leaves. 
Type: Term Pronunciation: rē-pand′ Definitions: 1. Denoting a bacterial colony with edges marked by a series of slightly concave segments with angular projections at their points of union.
In botany, the term repand refers to something, usually a leaf, having a wavy margin.
[adj] - having a slightly undulating margin
adjective having a slightly undulating margin